2.2.6-SNAPSHOT

* Log a message when hitting a key that would have failed previously

* spelling

.gitignore

@@ -7,4 +7,6 @@ target/
 logs/
 server/pki/
 client/src/main/python/setup.py
+grafana/timely-app/yarn-error.log
+grafana/timely-app/data/
 

LICENSE

@@ -1,7 +1,7 @@
 
                                  Apache License
                            Version 2.0, January 2004
-                        http://www.apache.org/licenses/
+                        httpProperties://www.apache.org/licenses/
 
    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
@@ -193,7 +193,7 @@
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
 
-       http://www.apache.org/licenses/LICENSE-2.0
+       httpProperties://www.apache.org/licenses/LICENSE-2.0
 
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,

README.md

@@ -2,7 +2,7 @@
 
 [![Apache License][li]][ll]
 
-Timely is a time series database application that provides secure access to time series data. Timely is written in Java and designed to work with [Apache Accumulo](https://accumulo.apache.org/) and [Grafana](https://www.grafana.com). Documentation is located [here](https://nationalsecurityagency.github.io/timely/).
+Timely is a time series database application that provides secure access to time series data. Timely is written in Java and designed to work with [Apache Accumulo](https://accumuloProperties.apache.org/) and [Grafana](https://www.grafana.com). Documentation is located [here](https://nationalsecurityagency.github.io/timely/).
 
 [li]: https://img.shields.io/badge/license-ASL-blue.svg
 [ll]: https://www.apache.org/licenses/LICENSE-2.0

analytics/pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>timely</groupId>
     <artifactId>timely</artifactId>
-    <version>1.2.8-SNAPSHOT</version>
+    <version>2.2.6-SNAPSHOT</version>
   </parent>
   <artifactId>timely-analytics</artifactId>
   <!--
@@ -53,36 +53,17 @@
         </exclusion>
       </exclusions>
     </dependency>
+    <dependency>
+      <groupId>timely</groupId>
+      <artifactId>timely-common</artifactId>
+    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>timely</groupId>
-      <artifactId>timely-common</artifactId>
-      <scope>test</scope>
-    </dependency>
   </dependencies>
   <build>
-    <pluginManagement>
-      <plugins>
-        <plugin>
-          <groupId>org.apache.maven.plugins</groupId>
-          <artifactId>maven-compiler-plugin</artifactId>
-          <configuration>
-            <compilerId>jdt</compilerId>
-          </configuration>
-          <dependencies>
-            <dependency>
-              <groupId>org.eclipse.tycho</groupId>
-              <artifactId>tycho-compiler-jdt</artifactId>
-              <version>1.4.0</version>
-            </dependency>
-          </dependencies>
-        </plugin>
-      </plugins>
-    </pluginManagement>
     <plugins>
       <plugin>
         <groupId>org.jacoco</groupId>
@@ -169,6 +150,12 @@
                 </excludes>
               </artifactSet>
               <filters>
+                <filter>
+                  <artifact>*:*</artifact>
+                  <excludes>
+                    <exclude>**/module-info.class</exclude>
+                  </excludes>
+                </filter>
                 <filter>
                   <artifact>org.apache.flink:*</artifact>
                   <excludes>
@@ -246,6 +233,14 @@
                   <artifactSet>
                     <excludes combine.self="override" />
                   </artifactSet>
+                  <filters>
+                    <filter>
+                      <artifact>*:*</artifact>
+                      <excludes>
+                        <exclude>**/module-info.class</exclude>
+                      </excludes>
+                    </filter>
+                  </filters>
                 </configuration>
               </execution>
             </executions>

analytics/src/main/java/timely/analytics/flink/MetricHistogram.java

@@ -7,6 +7,7 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 import org.apache.flink.streaming.util.serialization.SerializationSchema;
+
 import timely.model.Tag;
 
 public class MetricHistogram implements Serializable, SerializationSchema<MetricHistogram> {

analytics/src/main/java/timely/analytics/flink/MetricKeySelector.java

@@ -1,13 +1,13 @@
 package timely.analytics.flink;
 
 import org.apache.flink.api.java.functions.KeySelector;
+
 import timely.api.response.MetricResponse;
 
 /**
- * Uniquely defines a time series in a Flink stream. A unique time series is the
+ * Uniquely defines a time series in a Flink stream. A unique time series is the metric name and all of its tags, to include visibility if it exists.
- * metric name and all of its tags, to include visibility if it exists.
  */
-public class MetricKeySelector implements KeySelector<MetricResponse, String> {
+public class MetricKeySelector implements KeySelector<MetricResponse,String> {
 
     private static final long serialVersionUID = 1L;
 

analytics/src/main/java/timely/analytics/flink/SortedStringAccumulator.java

@@ -9,11 +9,11 @@ import org.apache.flink.api.common.accumulators.Accumulator;
  * Custom accumulator that retains a sorted map of strings and their counts
  *
  */
-public class SortedStringAccumulator implements Accumulator<String, ConcurrentSkipListMap<String, MutableLong>> {
+public class SortedStringAccumulator implements Accumulator<String,ConcurrentSkipListMap<String,MutableLong>> {
 
     private static final long serialVersionUID = 1L;
 
-    private ConcurrentSkipListMap<String, MutableLong> values = new ConcurrentSkipListMap<>();
+    private ConcurrentSkipListMap<String,MutableLong> values = new ConcurrentSkipListMap<>();
 
     @Override
     public void add(String value) {
@@ -25,7 +25,7 @@ public class SortedStringAccumulator implements Accumulator<String, ConcurrentSk
     }
 
     @Override
-    public ConcurrentSkipListMap<String, MutableLong> getLocalValue() {
+    public ConcurrentSkipListMap<String,MutableLong> getLocalValue() {
         return values;
     }
 
@@ -35,7 +35,7 @@ public class SortedStringAccumulator implements Accumulator<String, ConcurrentSk
     }
 
     @Override
-    public void merge(Accumulator<String, ConcurrentSkipListMap<String, MutableLong>> other) {
+    public void merge(Accumulator<String,ConcurrentSkipListMap<String,MutableLong>> other) {
         other.getLocalValue().forEach((k, v) -> {
             if (values.containsKey(k)) {
                 values.get(k).add(v.longValue());
@@ -46,7 +46,7 @@ public class SortedStringAccumulator implements Accumulator<String, ConcurrentSk
     }
 
     @Override
-    public Accumulator<String, ConcurrentSkipListMap<String, MutableLong>> clone() {
+    public Accumulator<String,ConcurrentSkipListMap<String,MutableLong>> clone() {
         SortedStringAccumulator a = new SortedStringAccumulator();
         a.getLocalValue().putAll(this.values);
         return a;

analytics/src/main/java/timely/analytics/flink/SubscriptionSource.java

@@ -22,6 +22,7 @@ import org.apache.flink.streaming.api.functions.source.RichSourceFunction;
 import org.apache.flink.streaming.api.watermark.Watermark;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
 import timely.api.response.MetricResponse;
 import timely.api.response.MetricResponses;
 import timely.client.websocket.ClientHandler;
@@ -41,7 +42,7 @@ public class SubscriptionSource extends RichSourceFunction<MetricResponse> imple
         }
     }
 
-    private static final Logger LOG = LoggerFactory.getLogger(SubscriptionSource.class);
+    private static final Logger log = LoggerFactory.getLogger(SubscriptionSource.class);
     private static final long serialVersionUID = 1L;
 
     private transient WebSocketSubscriptionClient client = null;
@@ -63,12 +64,11 @@ public class SubscriptionSource extends RichSourceFunction<MetricResponse> imple
 
     @Override
     public void open(Configuration parameters) throws Exception {
-        LOG.info("Opening summarization job.");
+        log.info("Opening summarization job.");
         super.open(parameters);
-        client = new WebSocketSubscriptionClient(jp.getTimelyHostname(), jp.getTimelyHttpsPort(), jp.getTimelyWssPort(),
+        client = new WebSocketSubscriptionClient(jp.getTimelyHostname(), jp.getTimelyHttpsPort(), jp.getTimelyWssPort(), jp.isClientAuth(), jp.isDoLogin(),
-                jp.isClientAuth(), jp.isDoLogin(), jp.getTimelyUsername(), jp.getTimelyPassword(), jp.getKeyStoreFile(),
+                        jp.getKeyStoreFile(), jp.getKeyStoreType(), jp.getKeyStorePass(), jp.getTrustStoreFile(), jp.getTrustStoreType(),
-                jp.getKeyStoreType(), jp.getKeyStorePass(), jp.getTrustStoreFile(), jp.getTrustStoreType(),
+                        jp.getTrustStorePass(), jp.isHostVerificationEnabled(), jp.getBufferSize());
-                jp.getTrustStorePass(), jp.isHostVerificationEnabled(), jp.getBufferSize());
     }
 
     @Override
@@ -81,7 +81,7 @@ public class SubscriptionSource extends RichSourceFunction<MetricResponse> imple
 
     @Override
     public void run(SourceContext<MetricResponse> ctx) throws Exception {
-        LOG.info("Running summarization job");
+        log.info("Running summarization job");
         final SortedStringAccumulator dateTimeAccumulator = new SortedStringAccumulator();
         this.getRuntimeContext().addAccumulator("source hourly count", dateTimeAccumulator);
         final LongCounter sourceInputs = new LongCounter();
@@ -103,22 +103,20 @@ public class SubscriptionSource extends RichSourceFunction<MetricResponse> imple
 
                     @Override
                     public void onMessage(final String message) {
-                        LOG.info("Message received on Websocket session {}, length: {}", session.getId(),
+                        log.info("Message received on Websocket session {}, length: {}", session.getId(), message.length());
-                                message.length());
                         try {
                             // Deserialize in this thread
-                            final MetricResponses responses = JsonSerializer.getObjectMapper().readValue(message,
+                            final MetricResponses responses = JsonSerializer.getObjectMapper().readValue(message, MetricResponses.class);
-                                    MetricResponses.class);
                             // Process in the other
                             final Runnable r = () -> {
                                 responses.getResponses().forEach(response -> {
                                     if (response.isComplete()) {
-                                        LOG.info("Received last message.");
+                                        log.info("Received last message.");
                                         ctx.emitWatermark(new Watermark(Long.MAX_VALUE));
                                         subscriptionsRemaining.getAndDecrement();
                                         return;
                                     }
-                                    LOG.trace("Received metric: {}", response);
+                                    log.trace("Received metric: {}", response);
                                     long time = response.getTimestamp();
                                     ctx.collectWithTimestamp(response, time);
                                     dateTimeAccumulator.add(formatter.format(new Date(response.getTimestamp())));
@@ -141,11 +139,11 @@ public class SubscriptionSource extends RichSourceFunction<MetricResponse> imple
                                 inputProcessedInMainThread.add(1);
                             }
                         } catch (IOException e) {
-                            LOG.error("Error deserializing metric response, closing", e);
+                            log.error("Error deserializing metric response, closing", e);
                             try {
                                 close();
                             } catch (Exception e1) {
-                                LOG.error("Error closing client", e1);
+                                log.error("Error closing client", e1);
                             }
                         }
                     }
@@ -158,7 +156,7 @@ public class SubscriptionSource extends RichSourceFunction<MetricResponse> imple
                 try {
                     close();
                 } catch (Exception e1) {
-                    LOG.error("Error closing client", e1);
+                    log.error("Error closing client", e1);
                 }
                 // Signal done sending data
                 ctx.emitWatermark(new Watermark(Long.MAX_VALUE));
@@ -170,7 +168,7 @@ public class SubscriptionSource extends RichSourceFunction<MetricResponse> imple
                 try {
                     close();
                 } catch (Exception e1) {
-                    LOG.error("Error closing client", e1);
+                    log.error("Error closing client", e1);
                 }
             }
 
@@ -178,14 +176,14 @@ public class SubscriptionSource extends RichSourceFunction<MetricResponse> imple
         try {
             client.open(handler);
             for (String m : metrics) {
-                LOG.info("Adding subscription for {}", m);
+                log.info("Adding subscription for {}", m);
                 client.addSubscription(m, null, start, end, 5000);
             }
             while (!client.isClosed() && subscriptionsRemaining.get() > 0) {
                 try {
                     Thread.sleep(5000);
                 } catch (InterruptedException e) {
-                    LOG.error("Sleep interrupted.");
+                    log.error("Sleep interrupted.");
                 }
             }
         } finally {
@@ -195,21 +193,21 @@ public class SubscriptionSource extends RichSourceFunction<MetricResponse> imple
 
     @Override
     public void cancel() {
-        LOG.info("Cancelling subscription source.");
+        log.info("Cancelling subscription source.");
         try {
             close();
         } catch (Exception e) {
-            LOG.error("Error closing web socket client");
+            log.error("Error closing web socket client");
         }
     }
 
     @Override
     public void stop() {
-        LOG.info("Stopping subscription source.");
+        log.info("Stopping subscription source.");
         try {
             close();
         } catch (Exception e) {
-            LOG.error("Error closing web socket client");
+            log.error("Error closing web socket client");
         }
 
     }

analytics/src/main/java/timely/analytics/flink/SummarizationJob.java

@@ -13,11 +13,12 @@ import org.apache.flink.streaming.api.functions.sink.SocketClientSink;
 import org.apache.flink.streaming.api.windowing.assigners.TumblingEventTimeWindows;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
 import timely.api.response.MetricResponse;
 
 public class SummarizationJob {
 
-    private static final Logger LOG = LoggerFactory.getLogger(SummarizationJob.class);
+    private static final Logger log = LoggerFactory.getLogger(SummarizationJob.class);
 
     public static void main(String[] args) throws Exception {
 
@@ -26,11 +27,11 @@ public class SummarizationJob {
             System.exit(1);
         }
 
-        LOG.info("Loading properties from: {}", args[0]);
+        log.info("Loading properties from: {}", args[0]);
         ParameterTool params = ParameterTool.fromPropertiesFile(args[0]);
 
         final SummarizationJobParameters jp = new SummarizationJobParameters(params);
-        LOG.info("Properties: {}", jp);
+        log.info("Properties: {}", jp);
 
         final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
         // @formatter:off
@@ -42,7 +43,7 @@ public class SummarizationJob {
         .window(TumblingEventTimeWindows.of(jp.getSummarizationInterval()))
         .fold(new MetricHistogram(), new FoldFunction<MetricResponse, MetricHistogram>() {
 
-            private final Logger LOG = LoggerFactory
+            private final Logger log = LoggerFactory
                     .getLogger("timely.analytics.SummarizationJob.FoldFunction@");
             private static final long serialVersionUID = 1L;
 
@@ -58,7 +59,7 @@ public class SummarizationJob {
                         throw new RuntimeException("Tags don't not match - partitioning problem");
                     }
                 }
-                LOG.trace("Updating histogram for {} with value {} at {} for metric {}", histo.getMetric()
+                log.trace("Updating histogram for {} with value {} at {} for metric {}", histo.getMetric()
                         + histo.getTags(), metric.getValue(), metric.getTimestamp(), metric.getMetric()
                         + metric.getTags());
                 histo.update(metric.getValue(), metric.getTimestamp());
@@ -70,7 +71,7 @@ public class SummarizationJob {
             new SocketClientSink<MetricHistogram>(jp.getTimelyHostname(), jp.getTimelyTcpPort(),
                     new MetricHistogram(), 2, true) {
 
-                private final Logger LOG = LoggerFactory
+                private final Logger log = LoggerFactory
                         .getLogger("timely.analytics.SummarizationJob.SocketClientSink");
                 private static final long serialVersionUID = 1L;
                 private final LongCounter sinkCounter = new LongCounter();
@@ -82,7 +83,7 @@ public class SummarizationJob {
                     super.open(parameters);
                     this.getRuntimeContext().addAccumulator("sink counter", this.sinkCounter);
                     this.getRuntimeContext().addAccumulator("sink hourly count", dateTimeAccumulator);
-                    LOG.info("Sink opened");
+                    log.info("Sink opened");
                 }
 
                 @Override
@@ -96,7 +97,7 @@ public class SummarizationJob {
                 @Override
                 public void close() throws Exception {
                     super.close();
-                    LOG.info("Sink closed");
+                    log.info("Sink closed");
                 }
 
             }).name("Timely Metric Sink");

analytics/src/main/java/timely/analytics/flink/SummarizationJobParameters.java

@@ -184,8 +184,8 @@ public class SummarizationJobParameters extends GlobalJobParameters implements S
     }
 
     @Override
-    public Map<String, String> toMap() {
+    public Map<String,String> toMap() {
-        Map<String, String> m = new HashMap<>();
+        Map<String,String> m = new HashMap<>();
         m.put("timelyHostname", this.timelyHostname);
         m.put("timelyHttpsPort", Integer.toString(this.timelyHttpsPort));
         m.put("timelyWssPort", Integer.toString(this.timelyWssPort));

analytics/src/main/spotbugs/excludes.xml

@@ -15,4 +15,12 @@
     <Method name="getMetrics" />
     <Bug pattern="EI_EXPOSE_REP" />
   </Match>
+  <Match>
+    <!-- these are probably avoidable, but needs further triage to fix -->
+    <Bug pattern="EI_EXPOSE_REP" />
+  </Match>
+  <Match>
+    <!-- these are probably avoidable, but needs further triage to fix -->
+    <Bug pattern="EI_EXPOSE_REP2" />
+  </Match>
 </FindBugsFilter>

analytics/src/test/java/timely/analytics/flink/MetricHistogramTest.java

@@ -6,6 +6,7 @@ import java.util.List;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
+
 import timely.model.Metric;
 import timely.model.Tag;
 import timely.model.parse.MetricParser;
@@ -96,9 +97,8 @@ public class MetricHistogramTest {
             Metric metric = metricParser.parse(put);
             Assert.assertEquals("sys.cpu.user_summarized", metric.getName());
             metric.getTags().forEach(t -> {
-                Assert.assertTrue(
+                Assert.assertTrue(t.equals(t1) || t.equals(t2) || t.equals(avg) || t.equals(min) || t.equals(max) || t.equals(sum) || t.equals(count)
-                        t.equals(t1) || t.equals(t2) || t.equals(avg) || t.equals(min) || t.equals(max) || t.equals(sum)
+                                || t.equals(p50) || t.equals(p75) || t.equals(p90) || t.equals(p99));
-                                || t.equals(count) || t.equals(p50) || t.equals(p75) || t.equals(p90) || t.equals(p99));
             });
         }
     }

balancer/bin/start-all.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+if [[ `uname` == "Darwin" ]]; then
+    THIS_SCRIPT=`python -c 'import os,sys; print os.path.realpath(sys.argv[1])' $0`
+else
+    THIS_SCRIPT=`readlink -f $0`
+fi
+
+THIS_DIR="${THIS_SCRIPT%/*}"
+BASE_DIR=$(cd $THIS_DIR/.. && pwd)
+BIN_DIR=${BASE_DIR}/bin
+
+. ${BIN_DIR}/timely-balancer-env.sh
+
+for i in $(seq 1 $NUM_INSTANCES); do
+    echo ${BIN_DIR}/timely-balancer.sh $i
+    ${BIN_DIR}/timely-balancer.sh $i
+done

balancer/bin/stop-all.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+if [[ `uname` == "Darwin" ]]; then
+    THIS_SCRIPT=`python -c 'import os,sys; print os.path.realpath(sys.argv[1])' $0`
+else
+    THIS_SCRIPT=`readlink -f $0`
+fi
+
+THIS_DIR="${THIS_SCRIPT%/*}"
+BASE_DIR=$(cd $THIS_DIR/.. && pwd)
+BIN_DIR=${BASE_DIR}/bin
+
+. ${BIN_DIR}/timely-balancer-env.sh
+
+for i in $(seq 1 $NUM_INSTANCES); do
+    PID=`jps -m | grep -E 'timely-balancer-.*-exec.jar' | grep "instance=${i}" | awk '{print $1}'`
+    if [ "$PID" != "" ]; then
+        echo "stopping timely-balancer instance ${i} [${PID}]"
+        kill -9 $PID
+    fi
+done

balancer/bin/testing/load-test-env.sh

@@ -1,11 +0,0 @@
-#!/bin/bash
-
-export TRUSTSTORE_FILE=
-export TRUSTSTORE_TYPE="jks";
-export TRUSTSTORE_PASS=
-export KEYSTORE_FILE=
-export KEYSTORE_TYPE="pkcs12";
-export KEYSTORE_PASS=
-
-export NUM_QUERY_THREADS=4
-export NUM_INGEST_THREADS=4

balancer/bin/testing/load-test-ingest.sh

@@ -1,21 +0,0 @@
-#!/bin/bash
-
-if [[ `uname` == "Darwin" ]]; then
-        THIS_SCRIPT=`python -c 'import os,sys; print os.path.realpath(sys.argv[1])' $0`
-else
-        THIS_SCRIPT=`readlink -f $0`
-fi
-
-THIS_DIR="${THIS_SCRIPT%/*}"
-BASE_DIR=${THIS_DIR}/../..
-TMP_DIR="${BASE_DIR}/tmp"
-CONF_DIR="${BASE_DIR}/conf"
-LIB_DIR="${BASE_DIR}/lib"
-
-. ${THIS_DIR}/load-test-env.sh
-
-export CLASSPATH="${CONF_DIR}:${THIS_DIR}:${LIB_DIR}/*"
-JVM_ARGS="-Xmx1G -Xms1G"
-
-echo "$JAVA_HOME/bin/java ${JVM_ARGS} timely.testing.MetricPutLoadTest $*"
-$JAVA_HOME/bin/java ${JVM_ARGS} timely.testing.MetricPutLoadTest $*

balancer/bin/testing/load-test-query.sh

@@ -1,21 +0,0 @@
-#!/bin/bash
-
-if [[ `uname` == "Darwin" ]]; then
-        THIS_SCRIPT=`python -c 'import os,sys; print os.path.realpath(sys.argv[1])' $0`
-else
-        THIS_SCRIPT=`readlink -f $0`
-fi
-
-THIS_DIR="${THIS_SCRIPT%/*}"
-BASE_DIR=${THIS_DIR}/../..
-TMP_DIR="${BASE_DIR}/tmp"
-CONF_DIR="${BASE_DIR}/conf"
-LIB_DIR="${BASE_DIR}/lib"
-
-. ${THIS_DIR}/load-test-env.sh
-
-export CLASSPATH="${CONF_DIR}:${THIS_DIR}:${LIB_DIR}/*"
-JVM_ARGS="-Xmx1G -Xms1G"
-
-echo "$JAVA_HOME/bin/java ${JVM_ARGS} timely.testing.MetricQueryLoadTest $*"
-$JAVA_HOME/bin/java ${JVM_ARGS} timely.testing.MetricQueryLoadTest $*

balancer/bin/timely-balancer-env.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+NUM_INSTANCES=1
+ACCUMULO_ZOOKEEPERS=localhost:2181
+HADOOP_CONF_DIR=${HADOOP_CONF_DIR}
+HADOOP_DEFAULT_FS=hdfs://localhost:8020
+TCP_BASE_PORT=4242
+HTTP_BASE_PORT=4243
+WEBSOCKET_BASE_PORT=4244
+UDP_BASE_PORT=4245
+
+HOST_IP=0.0.0.0
+HOST=$(hostname -s)
+HOST_VERIFICATION_ENABLED=true
+
+GENERATE_KEYS=true
+TRUST_STORE_TYPE=
+TRUST_STORE_FILE=
+TRUST_STORE_PASSWORD=
+KEY_STORE_TYPE=
+KEY_STORE_FILE=
+KEY_STORE_PASSWORD=
+AUTHORIZATION_URL=
+AUTHORIZATION_CERTIFICATE_TYPE=
+AUTHORIZATION_CERTIFICATE_FILE=
+ANONYMOUS_HTTP=true
+ANONYMOUS_WEBSOCKET=true

balancer/bin/timely-balancer.sh

@@ -1,42 +1,64 @@
 #!/bin/bash
 
-if [[ `uname` == "Darwin" ]]; then
+if [[ $(uname) == "Darwin" ]]; then
-        THIS_SCRIPT=`python -c 'import os,sys; print os.path.realpath(sys.argv[1])' $0`
+    THIS_SCRIPT=$(python -c 'import os,sys; print os.path.realpath(sys.argv[1])' "$0")
-        TCNATIVE_SUFFIX="jnilib"
 else
-        THIS_SCRIPT=`readlink -f $0`
+    THIS_SCRIPT=$(readlink -f "$0")
-        TCNATIVE_SUFFIX="so"
+    HW=`uname -m`
+    OS_PATH=linux-${HW}
 fi
 
-THIS_DIR="${THIS_SCRIPT%/*}"
+if [ -z "$1" ]; then
-NATIVE_DIR="${THIS_DIR}/META-INF/native"
+    export INSTANCE="1"
-BASE_DIR=${THIS_DIR}/..
+else
-TMP_DIR="${BASE_DIR}/tmp"
+    export INSTANCE="$1"
-CONF_DIR="${BASE_DIR}/conf"
-LIB_DIR="${BASE_DIR}/lib"
-NUM_SERVER_THREADS=4
-
-if [[ -e ${TMP_DIR} ]]; then
-  rm -rf ${TMP_DIR}
 fi
-mkdir ${TMP_DIR}
 
-if [[ -e ${NATIVE_DIR} ]]; then
+PID=$(jps -m | grep -E 'timely-balancer-.*-exec.jar' | grep "instance=${INSTANCE}" | awk '{print $1}')
-  rm -rf ${NATIVE_DIR}
+
+if [ "$PID" == "" ]; then
+    THIS_DIR="${THIS_SCRIPT%/*}"
+    BASE_DIR=$(cd "$THIS_DIR"/.. && pwd)
+    LIB_DIR="${BASE_DIR}/lib"
+    BIN_DIR="${BASE_DIR}/bin"
+    export CONF_DIR="${BASE_DIR}/conf"
+    NATIVE_DIR="${BIN_DIR}/META-INF/native"
+
+    set -a
+    . "${BIN_DIR}/timely-balancer-env.sh"
+    set +a
+
+    # use either a value from timely-balancer-env.sh or the default
+    export LOG_DIR="${TIMELY_LOG_DIR:-${BASE_DIR}/logs}"
+
+    if [[ ! -e ${NATIVE_DIR} ]]; then
+        mkdir -p "${NATIVE_DIR}"
+    fi
+
+    if [[ ! -e ${LOG_DIR} ]]; then
+        mkdir "${LOG_DIR}"
+    fi
+
+    JVM_ARGS="-Xmx2G -Xms2G -XX:NewSize=1G -XX:MaxNewSize=1G"
+    JVM_ARGS="${JVM_ARGS} -Dlogging.config=${CONF_DIR}/log4j2.yml"
+    JVM_ARGS="${JVM_ARGS} -Dlog4j2.contextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector"
+    JVM_ARGS="${JVM_ARGS} -XX:+UseG1GC -XX:+UseStringDeduplication"
+    JVM_ARGS="${JVM_ARGS} -Djava.net.preferIPv4Stack=true"
+    JVM_ARGS="${JVM_ARGS} -XX:+UseNUMA"
+
+    # for linux varieties of OS, extract native libraries if not already present
+    if [[ -n "$OS_PATH" ]]; then
+        if [[ ! -d ${NATIVE_DIR} || -z "$(ls -A ${NATIVE_DIR})" ]]; then
+            pushd "${BASE_DIR}/bin" || exit
+            "${JAVA_HOME}"/bin/jar xf "${LIB_DIR}"/netty-tcnative-boringssl-static-*.Final-"${OS_PATH}".jar META-INF/native/libnetty_tcnative_linux_"${HW}".so
+            "${JAVA_HOME}"/bin/jar xf "${LIB_DIR}"/netty-transport-native-epoll-*-"${OS_PATH}".jar META-INF/native/libnetty_transport_native_epoll_"${HW}".so
+            popd || exit
+        fi
+        JVM_ARGS="${JVM_ARGS} -Djava.library.path=${NATIVE_DIR}"
+    fi
+
+    echo "${JAVA_HOME}/bin/java ${JVM_ARGS} -jar ${BIN_DIR}/timely-balancer-*-exec.jar --instance=${INSTANCE}"
+    nohup "${JAVA_HOME}"/bin/java ${JVM_ARGS} -jar "${BIN_DIR}"/timely-balancer-*-exec.jar --instance="${INSTANCE}" >> "${LOG_DIR}/timely-balancer${INSTANCE}.out" 2>&1 &
+else
+    echo "timely-balancer --instance=${INSTANCE} already running with pid ${PID}"
 fi
-mkdir -p ${NATIVE_DIR}
-
-pushd ${BASE_DIR}/bin
-$JAVA_HOME/bin/jar xf ${LIB_DIR}/netty-tcnative-boringssl-static*.jar META-INF/native/libnetty_tcnative_linux_x86_64.${TCNATIVE_SUFFIX}
-$JAVA_HOME/bin/jar xf ${LIB_DIR}/netty-all*.jar META-INF/native/libnetty_transport_native_epoll_x86_64.${TCNATIVE_SUFFIX}
-popd
-
-export CLASSPATH="${CONF_DIR}:${LIB_DIR}/*:${HADOOP_CONF_DIR}"
-JVM_ARGS="-Xmx1G -Xms1G -Dio.netty.eventLoopThreads=${NUM_SERVER_THREADS} -Dlog4j.configurationFile=${CONF_DIR}/log4j2-spring.xml"
-JVM_ARGS="${JVM_ARGS} -DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector"
-JVM_ARGS="${JVM_ARGS} -Djava.library.path=${NATIVE_DIR}"
-
-#JVM_ARGS="${JVM_ARGS} -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005"
-
-echo "$JAVA_HOME/bin/java ${JVM_ARGS} timely.balancer.Balancer --spring.config.name=timely --spring.profiles.active=balancer"
-$JAVA_HOME/bin/java ${JVM_ARGS} timely.balancer.Balancer --spring.config.name=timely --spring.profiles.active=balancer

balancer/conf/log4j2-error-console.xml

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Configuration status="warn" monitorInterval="60">
-  <Appenders>
-    <Console name="Console" target="SYSTEM_OUT">
-      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
-    </Console>
-  </Appenders>
-  <Loggers>
-    <Root level="error" includeLocation="false">
-      <AppenderRef ref="Console" level="error" />
-    </Root>
-  </Loggers>
-</Configuration>

balancer/conf/log4j2-spring.xml

@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Configuration status="warn" monitorInterval="60">
-  <Properties>
-    <Property name="PID">????</Property>
-    <Property name="LOG_PATTERN">%clr{%d{yyyy-MM-dd HH:mm:ss.SSS}}{faint} %clr{%5p} %clr{${sys:PID}}{magenta} %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n%wEx</Property>
-  </Properties>
-  <Appenders>
-    <RollingRandomAccessFile name="Rolling" fileName="/srv/logs/timely/timely-balancer.log"
-    						 filePattern="/srv/logs/timely/$${date:yyyy-MM}/timely-balancer-%d{MM-dd-yyyy}-%i.log.gz">
-      <PatternLayout pattern="${LOG_PATTERN}"/>
-      <Policies>
-      	<SizeBasedTriggeringPolicy size="1024 MB" />
-      </Policies>
-      <DefaultRolloverStrategy max="10" />
-    </RollingRandomAccessFile>
-    <Console name="Console" target="SYSTEM_OUT">
-      <PatternLayout pattern="${LOG_PATTERN}"/>
-    </Console>
-  </Appenders>
-  <Loggers>
-    <Root level="trace" includeLocation="false">
-      <AppenderRef ref="Console" level="warn" />
-      <AppenderRef ref="Rolling" level="trace" />
-    </Root>
-    <Logger name="timely" additivity="false">
-      <AppenderRef ref="Console" level="debug" />
-    </Logger>
-  </Loggers>
-</Configuration>

balancer/conf/log4j2.yml

@@ -0,0 +1,36 @@
+Configuration:
+  status: warn
+  monitorInterval: 60
+
+  Properties:
+    Property:
+      - name: logDir
+        value: ${env:LOG_DIR}
+      - name: PID
+        value: "????"
+      - name: LOG_PATTERN
+        value: "%d{ISO8601} %-5p [%-40.40t] [%-40.40c{1.}] %m%n%wEx"
+
+  Appenders:
+    RollingFile:
+      - name: File
+        fileName: "${sys:logDir}/timely-balancer${env:INSTANCE}.log"
+        filePattern: "${sys:logDir}/timely-balancer${env:INSTANCE}.log.%d{yyyy-MM-dd}-%i.gz"
+        append: true
+        bufferedIO: true
+        bufferSize: 8192
+        Policies:
+          TimeBasedTriggeringPolicy:
+            interval: 1
+          SizeBasedTriggeringPolicy:
+            size: 250MB
+        DefaultRolloverStrategy:
+          max: 10
+        PatternLayout:
+          pattern: "${LOG_PATTERN}"
+
+  Loggers:
+    Root:
+      level: info
+      AppenderRef:
+        - ref: File

balancer/conf/security.xml

@@ -1,71 +0,0 @@
-<beans:beans xmlns="http://www.springframework.org/schema/security"
-             xmlns:beans="http://www.springframework.org/schema/beans"
-             xmlns:util="http://www.springframework.org/schema/util"
-             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-             xsi:schemaLocation="http://www.springframework.org/schema/beans
-								 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
-								 http://www.springframework.org/schema/security
-								 http://www.springframework.org/schema/security/spring-security.xsd
-								 http://www.springframework.org/schema/util
-								 http://www.springframework.org/schema/util/spring-util.xsd">
-		          
-	<beans:bean id="x509PrincipalExtractor" class="org.springframework.security.web.authentication.preauth.x509.SubjectDnX509PrincipalExtractor">
-		<beans:property name="subjectDnRegex" value="CN=(.*?)(?:,|$)"/>
-	</beans:bean>
-
-	<beans:bean id="timelyUserDetailsService" class="timely.auth.UserDetailsService">
-		<beans:property name="users">
-			<util:list>
-				<beans:bean class="timely.auth.TimelyUser">
-					<beans:constructor-arg name="subjectDn">
-						<beans:value>CN=example.com</beans:value>
-					</beans:constructor-arg>
-					<beans:constructor-arg name="auths">
-						<util:list>
-							<beans:value>D</beans:value>
-							<beans:value>E</beans:value>
-							<beans:value>F</beans:value>
-						</util:list>
-					</beans:constructor-arg>
-					<beans:constructor-arg name="roles">
-						<util:list>
-							<beans:value>G</beans:value>
-							<beans:value>H</beans:value>
-							<beans:value>I</beans:value>
-						</util:list>
-					</beans:constructor-arg>
-				</beans:bean>
-			</util:list>
-		</beans:property>
-	</beans:bean>
-    
-    <beans:bean id="x509AuthorizationProvider" class="org.springframework.security.web.authentication.preauth.PreAuthenticatedAuthenticationProvider">
-    	<beans:property name="preAuthenticatedUserDetailsService" ref="timelyUserDetailsService" />
-    </beans:bean>
-    
-    <user-service id="usernamePasswordService">
-    	<user name="test" password="test1" authorities="A,B,C" />
-    </user-service>
-
-	<beans:bean id="noOpPasswordEncoder" class="org.springframework.security.crypto.password.NoOpPasswordEncoder"/>
-
-	<beans:bean id="UserNamePasswordAuthenticationProvider" class="org.springframework.security.authentication.dao.DaoAuthenticationProvider">
-		<beans:property name="userDetailsService" ref="usernamePasswordService"/>
-		<beans:property name="passwordEncoder" ref="noOpPasswordEncoder"/>
-	</beans:bean>
-	    
-	<authentication-manager alias="authenticationManager">
-		<!-- X509 PreAuthenticated authorization provider -->
-		<authentication-provider ref="x509AuthorizationProvider"/>
-		<!-- Basic authorization provider, validates provided username and password -->
-		<authentication-provider ref="UserNamePasswordAuthenticationProvider" />
-	</authentication-manager>
-
-	<util:list id="requiredRoles" value-type="java.lang.String">
-		<beans:value></beans:value>
-	</util:list>
-
-	<util:list id="requiredAuths" value-type="java.lang.String">
-		<beans:value></beans:value>
-	</util:list>
-</beans:beans>

balancer/conf/timely-balancer.yml

@@ -1,131 +1,168 @@
-timely-balancer:
+timely:
-  zooKeeper:
+  instance: ${INSTANCE}
-    servers: localhost:2181
+  zookeeper:
+    servers: ${ACCUMULO_ZOOKEEPERS}
     timeout: 30s
-  checkServerHealthInterval: 10000
-  serverFailuresBeforeDown: 6
-  serverSuccessesBeforeUp: 1
-  assignmentFile: /timely/balancer/assignments.csv
   security:
     session-max-age: 86400
     cache-expiration-minutes: 60
     cache-refresh-minutes: 5
-    allow-anonymous-http-access: true
+    authorization-url: ${AUTHORIZATION_URL}
-    allow-anonymous-ws-access: true
+    allow-anonymous-http-access: ${ANONYMOUS_HTTP:true}
-    serverSsl:
+    allow-anonymous-ws-access: ${ANONYMOUS_WEBSOCKET:true}
-      certificate-file:
+    server-ssl:
-      key-file:
+      key-store-type: ${KEY_STORE_TYPE}
-      #key-password:
+      key-store-file: ${KEY_STORE_FILE}
-      use-generated-keypair: true
+      key-store-password: ${KEY_STORE_PASSWORD}
-      trust-store-file:
+      use-generated-keypair: ${GENERATE_KEYS}
-      use-openssl: true
+      ignore-ssl-handshake-errors: true
-      #use-ciphers:
+      trust-store-type: ${TRUST_STORE_TYPE}
-    clientSsl:
+      trust-store-file: ${TRUST_STORE_FILE}
-      keyFile:
+      trust-store-password: ${TRUST_STORE_PASSWORD}
-      keyType: pkcs12
+    client-ssl:
-      #keyPassword:
+      key-store-type: ${KEY_STORE_TYPE}
-      trustStoreFile:
+      key-store-file: ${KEY_STORE_FILE}
-      trustStoreType: jks
+      key-store-password: ${KEY_STORE_PASSWORD}
-      #trustStorePassword:
+      trust-store-type: ${TRUST_STORE_TYPE}
+      trust-store-file: ${TRUST_STORE_FILE}
+      trust-store-password: ${TRUST_STORE_PASSWORD}
+      hostVerificationEnabled: ${HOST_VERIFICATION_ENABLED:true}
+    jwt-ssl:
+      key-store-type: ${AUTHORIZATION_CERTIFICATE_TYPE}
+      key-store-file: ${AUTHORIZATION_CERTIFICATE_FILE}
+      key-store-password: ${AUTHORIZATION_CERTIFICATE_PASSWORD}
   cache:
     enabled: false
     metric-age-off-hours:
       default: 26
-    nonCachedMetrics:
+    non-cached-metrics:
-  server:
+  balancer:
-    ip: 127.0.0.1
+    check-server-health-interval: 10000
-    tcpPort: 4242
+    server-failures-before-down: 6
-    numTcpPools: 1
+    server-successes-before-up: 1
-    tcpBufferSize: 100
+    default-fs: ${HADOOP_DEFAULT_FS}
-    tcpClientPool:
+    fs-config-resources:
-      minIdlePerKey: 0
+      - ${HADOOP_CONF_DIR}/core-site.xml
-      maxIdlePerKey: 40
+      - ${HADOOP_CONF_DIR}/hdfs-site.xml
-      maxTotalPerKey: 40
+    assignment-file: hdfs:///timely/balancer/assignments.csv
-      maxTotal: -1
+    server:
-      lifo: true
+      ip: ${HOST_IP}
-      fairness: false
+      tcp-base-port: ${TCP_BASE_PORT}
-      maxWaitMillis: -1
+      tcp-buffer-size: 100
-      minEvictableIdleTimeMillis: 1800000
+      tcp-client-pool:
-      evictorShutdownTimeoutMillis: 10000
+        min-idle-per-key: 5
-      softMinEvictableIdleTimeMillis: -1
+        max-idle-per-key: 5
-      numTestsPerEvictionRun: 3
+        max-total-per-key: 5
-      timeBetweenEvictionRunsMillis: -1
+        max-total: -1
-      blockWhenExhausted: true
+        lifo: false
-      jmxEnabled: true
+        fairness: true
-      testOnBorrow: false
+        max-wait-millis: 60000
-      testOnReturn: false
+        min-evictable-idle-time-millis: -1
-    udpPort: 4245
+        evictor-shutdown-timeout-millis: 10000
-    udpClientPool:
+        soft-min-evictable-idle-time-millis: 300000
-      minIdlePerKey: 0
+        num-tests-per-eviction-run: 3
-      maxIdlePerKey: 40
+        time-between-eviction-runs-millis: 30000
-      maxTotalPerKey: 40
+        block-when-exhausted: true
-      maxTotal: -1
+        remove-abandoned-on-borrow: false
-      lifo: true
+        remove-abandoned-on-maintenance: true
-      fairness: false
+        remove-abandoned-timeout-millis: 600000
-      maxWaitMillis: -1
+        remove-abandoned-logging: true
-      minEvictableIdleTimeMillis: 1800000
+        jmx-enabled: true
-      evictorShutdownTimeoutMillis: 10000
+        test-on-borrow: false
-      softMinEvictableIdleTimeMillis: -1
+        test-on-return: false
-      numTestsPerEvictionRun: 3
+      udp-base-port: ${UDP_BASE_PORT}
-      timeBetweenEvictionRunsMillis: -1
+      udp-client-pool:
-      blockWhenExhausted: true
+        min-idle-per-key: 5
-      jmxEnabled: true
+        max-idle-per-key: 5
-      testOnBorrow: false
+        max-total-per-key: 5
-      testOnReturn: false
+        max-total: -1
-  http:
+        lifo: false
-    host: localhost
+        fairness: true
-    ip: 127.0.0.1
+        max-wait-millis: 60000
-    port: 4243
+        min-evictable-idle-time-millis: -1
-    redirect-path: /secure-me
+        evictor-shutdown-timeout-millis: 10000
-    strict-transport-max-age: 608400
+        soft-min-evictable-idle-time-millis: 300000
-    cors:
+        num-tests-per-eviction-run: 3
-      allow-any-origin: false
+        time-between-eviction-runs-millis: 30000
-      allow-null-origin: false
+        block-when-exhausted: true
-      allow-credentials: true
+        remove-abandoned-on-borrow: false
-      allowed-origins:
+        remove-abandoned-on-maintenance: true
-      allowed-methods: DELETE,GET,HEAD,OPTIONS,PUT,POST
+        remove-abandoned-timeout-millis: 600000
-      allowed-headers: content-type
+        remove-abandoned-logging: true
-    httpClientPool:
+        jmx-enabled: true
-      minIdlePerKey: 0
+        test-on-borrow: false
-      maxIdlePerKey: 40
+        test-on-return: false
-      maxTotalPerKey: 40
+    http:
-      maxTotal: -1
+      host: ${HOST}
-      lifo: true
+      ip: ${HOST_IP}
-      fairness: false
+      base-port: ${HTTP_BASE_PORT}
-      maxWaitMillis: -1
+      redirect-path: /secure-me
-      minEvictableIdleTimeMillis: 1800000
+      strict-transport-max-age: 604800
-      evictorShutdownTimeoutMillis: 10000
+      connection-request-timeout: 5000
-      softMinEvictableIdleTimeMillis: -1
+      connect-timeout: 5000
-      numTestsPerEvictionRun: 3
+      socketTimeout: 300000
-      timeBetweenEvictionRunsMillis: -1
+      request-timeout: 300000
-      blockWhenExhausted: true
+      cors:
-      jmxEnabled: true
+        allow-any-origin: false
-      testOnBorrow: false
+        allow-null-origin: false
-      testOnReturn: false
+        allow-credentials: true
-  websocket:
+        allowed-origins:
-    ip: 127.0.0.1
+        allowed-methods: DELETE,GET,HEAD,OPTIONS,PUT,POST
-    port: 5244
+        allowed-headers: content-type
-    timeout: 60
+      httpClientPool:
-    subscription-lag: 120
+        min-idle-per-key: 10
-    scanner-batch-size: 10000
+        max-idle-per-key: 40
-    flush-interval-seconds: 30
+        max-total-per-key: 40
-    scanner-read-ahead: 1
+        max-total: -1
-    subscription-batch-size: 5000
+        lifo: false
-    incomingBufferSize: 50000000
+        fairness: true
-    wsClientPool:
+        max-wait-millis: 60000
-      minIdlePerKey: 0
+        min-evictable-idle-time-millis: -1
-      maxIdlePerKey: 40
+        evictor-shutdown-timeout-millis: 10000
-      maxTotalPerKey: 40
+        soft-min-evictable-idle-time-millis: 300000
-      maxTotal: -1
+        num-tests-per-eviction-run: 3
-      lifo: true
+        time-between-eviction-runs-millis: 30000
-      fairness: false
+        block-when-exhausted: true
-      maxWaitMillis: -1
+        remove-abandoned-on-borrow: false
-      minEvictableIdleTimeMillis: 1800000
+        remove-abandoned-on-maintenance: true
-      evictorShutdownTimeoutMillis: 10000
+        remove-abandoned-timeout-millis: 600000
-      softMinEvictableIdleTimeMillis: -1
+        remove-abandoned-logging: true
-      numTestsPerEvictionRun: 3
+        jmx-enabled: true
-      timeBetweenEvictionRunsMillis: -1
+        test-on-borrow: false
-      blockWhenExhausted: true
+        test-on-return: false
-      jmxEnabled: true
+    websocket:
-      testOnBorrow: false
+      ip: ${HOST_IP}
-      testOnReturn: false
+      base-port: ${WEBSOCKET_BASE_PORT}
+      timeout: 60
+      subscription-lag: 120
+      scanner-batch-size: 10000
+      flush-interval-seconds: 30
+      scanner-read-ahead: 1
+      subscription-batch-size: 5000
+      incoming-buffer-size: 50000000
+      ws-client-pool:
+        min-idle-per-key: 0
+        max-idle-per-key: 40
+        max-total-per-key: 40
+        max-total: -1
+        lifo: false
+        fairness: true
+        max-wait-millis: 60000
+        min-evictable-idle-time-millis: -1
+        evictor-shutdown-timeout-millis: 10000
+        soft-min-evictable-idle-time-millis: 300000
+        num-tests-per-eviction-run: 3
+        time-between-eviction-runs-millis: 30000
+        block-when-exhausted: true
+        remove-abandoned-on-borrow: false
+        remove-abandoned-on-maintenance: true
+        remove-abandoned-timeout-millis: 600000
+        remove-abandoned-logging: true
+        jmx-enabled: true
+        test-on-borrow: false
+        test-on-return: false
+
+logging:
+  level:
+    ROOT: info
+    timely: debug

balancer/pom.xml

@@ -4,9 +4,13 @@
   <parent>
     <groupId>timely</groupId>
     <artifactId>timely</artifactId>
-    <version>1.2.8-SNAPSHOT</version>
+    <version>2.2.6-SNAPSHOT</version>
   </parent>
   <artifactId>timely-balancer</artifactId>
+  <description>Timely Balancer</description>
+  <properties>
+    <start-class>timely.balancer.TimelyBalancer</start-class>
+  </properties>
   <dependencies>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
@@ -37,12 +41,12 @@
       <artifactId>commons-beanutils</artifactId>
     </dependency>
     <dependency>
-      <groupId>io.github.lukehutch</groupId>
+      <groupId>io.github.classgraph</groupId>
-      <artifactId>fast-classpath-scanner</artifactId>
+      <artifactId>classgraph</artifactId>
     </dependency>
     <dependency>
       <groupId>io.netty</groupId>
-      <artifactId>netty-all</artifactId>
+      <artifactId>netty-transport-classes-epoll</artifactId>
     </dependency>
     <dependency>
       <groupId>net.sourceforge.javacsv</groupId>
@@ -51,16 +55,6 @@
     <dependency>
       <groupId>org.apache.accumulo</groupId>
       <artifactId>accumulo-core</artifactId>
-      <exclusions>
-        <exclusion>
-          <groupId>org.slf4j</groupId>
-          <artifactId>slf4j-log4j12</artifactId>
-        </exclusion>
-      </exclusions>
-    </dependency>
-    <dependency>
-      <groupId>org.apache.accumulo</groupId>
-      <artifactId>accumulo-minicluster</artifactId>
     </dependency>
     <dependency>
       <groupId>org.apache.commons</groupId>
@@ -97,21 +91,19 @@
     <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-common</artifactId>
-      <exclusions>
-        <exclusion>
-          <groupId>jdk.tools</groupId>
-          <artifactId>jdk.tools</artifactId>
-        </exclusion>
-      </exclusions>
     </dependency>
     <dependency>
-      <groupId>org.apache.hadoop</groupId>
+      <groupId>org.apache.logging.log4j</groupId>
-      <artifactId>hadoop-minicluster</artifactId>
+      <artifactId>log4j-1.2-api</artifactId>
     </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-webflux</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-websocket</artifactId>
@@ -134,6 +126,18 @@
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-validation</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-web</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.cloud</groupId>
+      <artifactId>spring-cloud-context</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.cloud</groupId>
+      <artifactId>spring-cloud-starter-bootstrap</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.springframework.security</groupId>
       <artifactId>spring-security-config</artifactId>
@@ -150,10 +154,6 @@
       <groupId>timely</groupId>
       <artifactId>timely-common</artifactId>
     </dependency>
-    <dependency>
-      <groupId>timely</groupId>
-      <artifactId>timely-server</artifactId>
-    </dependency>
     <dependency>
       <groupId>com.lmax</groupId>
       <artifactId>disruptor</artifactId>
@@ -162,6 +162,30 @@
     <dependency>
       <groupId>io.netty</groupId>
       <artifactId>netty-tcnative-boringssl-static</artifactId>
+      <classifier>linux-aarch_64</classifier>
+      <scope>runtime</scope>
+    </dependency>
+    <dependency>
+      <groupId>io.netty</groupId>
+      <artifactId>netty-tcnative-boringssl-static</artifactId>
+      <classifier>linux-x86_64</classifier>
+      <scope>runtime</scope>
+    </dependency>
+    <dependency>
+      <groupId>io.netty</groupId>
+      <artifactId>netty-transport-native-epoll</artifactId>
+      <classifier>linux-aarch_64</classifier>
+      <scope>runtime</scope>
+    </dependency>
+    <dependency>
+      <groupId>io.netty</groupId>
+      <artifactId>netty-transport-native-epoll</artifactId>
+      <classifier>linux-x86_64</classifier>
+      <scope>runtime</scope>
+    </dependency>
+    <dependency>
+      <groupId>javax.activation</groupId>
+      <artifactId>activation</artifactId>
       <scope>runtime</scope>
     </dependency>
     <dependency>
@@ -174,11 +198,6 @@
       <artifactId>log4j-core</artifactId>
       <scope>runtime</scope>
     </dependency>
-    <dependency>
-      <groupId>org.apache.logging.log4j</groupId>
-      <artifactId>log4j-slf4j-impl</artifactId>
-      <scope>runtime</scope>
-    </dependency>
     <dependency>
       <groupId>org.javassist</groupId>
       <artifactId>javassist</artifactId>
@@ -189,19 +208,38 @@
       <artifactId>junit</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-minicluster</artifactId>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.jsoup</groupId>
       <artifactId>jsoup</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-test</artifactId>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-test-autoconfigure</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>timely</groupId>
+      <artifactId>timely-test</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-maven-plugin</artifactId>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-assembly-plugin</artifactId>
@@ -261,6 +299,20 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-failsafe-plugin</artifactId>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>3.1.2</version>
+        <configuration>
+          <archive>
+            <manifest>
+              <!--suppress UnresolvedMavenProperty, MavenModelInspection -->
+              <mainClass>${start-class}</mainClass>
+              <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
+            </manifest>
+          </archive>
+        </configuration>
+      </plugin>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>build-helper-maven-plugin</artifactId>
@@ -288,4 +340,17 @@
       </extension>
     </extensions>
   </build>
+  <profiles>
+    <profile>
+      <id>docker</id>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>com.spotify</groupId>
+            <artifactId>docker-maven-plugin</artifactId>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
 </project>

balancer/src/main/dist/assembly.xml

@@ -15,20 +15,23 @@
         <include>NOTICE*</include>
       </includes>
     </fileSet>
-    <fileSet>
-      <directory>${project.build.directory}</directory>
-      <outputDirectory>lib</outputDirectory>
-      <includes>
-        <include>timely*.jar</include>
-      </includes>
-    </fileSet>
     <fileSet>
       <directory>${project.build.directory}/lib</directory>
       <outputDirectory>lib</outputDirectory>
       <includes>
-        <include>*.jar</include>
+        <include>netty-tcnative-boringssl-static*linux-x86_64.jar</include>
+        <include>netty-tcnative-boringssl-static*linux-aarch_64.jar</include>
+        <include>netty-transport-native-epoll*linux-x86_64.jar</include>
+        <include>netty-transport-native-epoll*linux-aarch_64.jar</include>
       </includes>
-     </fileSet>
+    </fileSet>
+    <fileSet>
+      <directory>${project.build.directory}</directory>
+      <outputDirectory>bin</outputDirectory>
+      <includes>
+        <include>timely-balancer-*-exec.jar</include>
+      </includes>
+    </fileSet>
     <fileSet>
       <directory>${project.basedir}/bin</directory>
       <outputDirectory>bin</outputDirectory>
@@ -43,12 +46,5 @@
         <include>*</include>
       </includes>
      </fileSet>
-	<fileSet>
-	  <directory>${project.basedir}/src/main/resources/webapp</directory>
-	  <outputDirectory>bin/webapp</outputDirectory>
-	  <includes>
-		<include>*</include>
-	  </includes>
-	</fileSet>
   </fileSets>
 </assembly>

balancer/src/main/docker/Dockerfile

@@ -0,0 +1,11 @@
+FROM azul/zulu-openjdk-alpine:11
+
+LABEL version=${project.version} \
+      run="docker run ${docker.image.prefix}${project.artifactId}:latest" \
+      description="${project.description}"
+
+ADD ${project.build.finalName}-exec.jar /app.jar
+RUN apk add libc6-compat curl
+
+EXPOSE 54322 54323 54324 54325
+ENTRYPOINT ["java","-jar","app.jar"]

balancer/src/main/java/timely/balancer/ArrivalRate.java

@@ -1,7 +1,7 @@
 package timely.balancer;
 
-import java.util.Timer;
+import java.util.concurrent.ScheduledExecutorService;
-import java.util.TimerTask;
+import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLong;
 
 import com.google.common.util.concurrent.AtomicDouble;
@@ -20,38 +20,26 @@ public class ArrivalRate {
     private AtomicDouble longTermRate = new AtomicDouble(0);
     private AtomicLong longTermLastReset = new AtomicLong(0);
 
-    public ArrivalRate(Timer timer) {
+    public ArrivalRate(ScheduledExecutorService arrivalRateExecutor) {
         long now = System.currentTimeMillis();
         shortTermLastReset.set(now);
         mediumTermLastReset.set(now);
         longTermLastReset.set(now);
 
         // 2 minute
-        timer.schedule(new TimerTask() {
+        arrivalRateExecutor.scheduleAtFixedRate(() -> {
-
+            resetShort();
-            @Override
+        }, 2, 2, TimeUnit.MINUTES);
-            public void run() {
-                resetShort();
-            }
-        }, 120000, 120000);
 
         // 5 minute
-        timer.schedule(new TimerTask() {
+        arrivalRateExecutor.scheduleAtFixedRate(() -> {
-
+            resetMedium();
-            @Override
+        }, 5, 5, TimeUnit.MINUTES);
-            public void run() {
-                resetMedium();
-            }
-        }, 300000, 300000);
 
         // 15 minute
-        timer.schedule(new TimerTask() {
+        arrivalRateExecutor.scheduleAtFixedRate(() -> {
-
+            resetLong();
-            @Override
+        }, 15, 15, TimeUnit.MINUTES);
-            public void run() {
-                resetLong();
-            }
-        }, 900000, 900000);
     }
 
     private void resetShort() {

balancer/src/main/java/timely/balancer/Balancer.java

@@ -1,21 +1,34 @@
 package timely.balancer;
 
-import static timely.Server.SERVICE_DISCOVERY_PATH;
+import static org.apache.accumulo.core.conf.ConfigurationTypeHelper.getTimeInMillis;
-import static timely.store.cache.DataStoreCache.NON_CACHED_METRICS;
+import static timely.Constants.NON_CACHED_METRICS;
-import static timely.store.cache.DataStoreCache.NON_CACHED_METRICS_LOCK_PATH;
+import static timely.Constants.NON_CACHED_METRICS_LOCK_PATH;
+import static timely.Constants.SERVICE_DISCOVERY_PATH;
 
-import java.io.File;
 import java.net.InetSocketAddress;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
-import java.util.Date;
+import java.util.Arrays;
 import java.util.List;
-import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
 
 import javax.net.ssl.SSLContext;
 
+import org.apache.commons.lang3.StringUtils;
+import org.apache.curator.RetryPolicy;
+import org.apache.curator.framework.CuratorFramework;
+import org.apache.curator.framework.CuratorFrameworkFactory;
+import org.apache.curator.retry.RetryForever;
+import org.apache.zookeeper.CreateMode;
+import org.apache.zookeeper.data.Stat;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.SpringApplication;
+import org.springframework.context.ApplicationContext;
+
+import io.netty.bootstrap.AbstractBootstrap;
 import io.netty.bootstrap.Bootstrap;
 import io.netty.bootstrap.ServerBootstrap;
 import io.netty.buffer.PooledByteBufAllocator;
@@ -25,7 +38,6 @@ import io.netty.channel.ChannelHandler;
 import io.netty.channel.ChannelInitializer;
 import io.netty.channel.ChannelOption;
 import io.netty.channel.EventLoopGroup;
-import io.netty.channel.WriteBufferWaterMark;
 import io.netty.channel.epoll.EpollChannelOption;
 import io.netty.channel.epoll.EpollDatagramChannel;
 import io.netty.channel.epoll.EpollEventLoopGroup;
@@ -46,48 +58,35 @@ import io.netty.handler.codec.http.HttpResponseEncoder;
 import io.netty.handler.codec.http.HttpServerCodec;
 import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
 import io.netty.handler.logging.LoggingHandler;
-import io.netty.handler.ssl.ClientAuth;
 import io.netty.handler.ssl.OpenSslServerContext;
 import io.netty.handler.ssl.OpenSslServerSessionContext;
 import io.netty.handler.ssl.SslContext;
-import io.netty.handler.ssl.SslContextBuilder;
-import io.netty.handler.ssl.SslProvider;
-import io.netty.handler.ssl.util.SelfSignedCertificate;
 import io.netty.handler.stream.ChunkedWriteHandler;
 import io.netty.handler.timeout.IdleStateHandler;
 import io.netty.util.NettyRuntime;
 import io.netty.util.internal.SystemPropertyUtil;
-import org.apache.accumulo.core.conf.AccumuloConfiguration;
+import timely.auth.JWTTokenHandler;
-import org.apache.curator.RetryPolicy;
+import timely.balancer.configuration.BalancerHttpProperties;
-import org.apache.curator.framework.CuratorFramework;
+import timely.balancer.configuration.BalancerProperties;
-import org.apache.curator.framework.CuratorFrameworkFactory;
+import timely.balancer.configuration.BalancerServerProperties;
-import org.apache.curator.retry.RetryForever;
+import timely.balancer.configuration.BalancerWebsocketProperties;
-import org.apache.zookeeper.CreateMode;
-import org.apache.zookeeper.data.Stat;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.boot.WebApplicationType;
-import org.springframework.boot.builder.SpringApplicationBuilder;
-import org.springframework.context.ConfigurableApplicationContext;
-import timely.auth.AuthCache;
-import timely.balancer.configuration.BalancerConfiguration;
-import timely.balancer.configuration.ClientSsl;
-import timely.balancer.configuration.SpringBootstrap;
 import timely.balancer.connection.http.HttpClientPool;
 import timely.balancer.connection.tcp.TcpClientPool;
 import timely.balancer.connection.udp.UdpClientPool;
 import timely.balancer.connection.ws.WsClientPool;
-import timely.balancer.healthcheck.HealthChecker;
 import timely.balancer.netty.http.HttpRelayHandler;
 import timely.balancer.netty.tcp.TcpRelayHandler;
 import timely.balancer.netty.udp.UdpRelayHandler;
 import timely.balancer.netty.ws.WsRelayHandler;
-import timely.balancer.resolver.BalancedMetricResolver;
+import timely.common.component.AuthenticationService;
-import timely.balancer.resolver.MetricResolver;
+import timely.common.configuration.SecurityProperties;
-import timely.client.http.HttpClient;
+import timely.common.configuration.SslClientProperties;
-import timely.configuration.ServerSsl;
+import timely.common.configuration.SslServerProperties;
-import timely.netty.http.HttpStaticFileServerHandler;
+import timely.common.configuration.ZookeeperProperties;
-import timely.netty.http.NonSslRedirectHandler;
+import timely.netty.http.HttpStrictTransportSecurityHandler;
+import timely.netty.http.HttpVersionRequestHandler;
+import timely.netty.http.NonSslForbiddenHandler;
+import timely.netty.http.NotFoundHandler;
 import timely.netty.http.TimelyExceptionHandler;
 import timely.netty.http.auth.X509LoginRequestHandler;
 import timely.netty.tcp.MetricsBufferDecoder;
@@ -105,17 +104,25 @@ public class Balancer {
     final public static String ASSIGNMENTS_LOCK_PATH = "/timely/balancer/assignments/lock";
     final public static String ASSIGNMENTS_LAST_UPDATED_PATH = "/timely/balancer/assignments/lastUpdated";
 
-    private static final Logger LOG = LoggerFactory.getLogger(Balancer.class);
+    private static final Logger log = LoggerFactory.getLogger(Balancer.class);
-    private static final int EPOLL_MIN_MAJOR_VERSION = 2;
+    private static final String EPOLL_MIN_VERSION = "2.7";
-    private static final int EPOLL_MIN_MINOR_VERSION = 6;
-    private static final int EPOLL_MIN_PATCH_VERSION = 32;
     private static final String OS_NAME = "os.name";
     private static final String OS_VERSION = "os.version";
     private static final String WS_PATH = "/websocket";
-    protected static final CountDownLatch LATCH = new CountDownLatch(1);
+    private BalancerProperties balancerProperties;
-    static ConfigurableApplicationContext applicationContext;
+    private SecurityProperties securityProperties;
-
+    private SslServerProperties sslServerProperties;
-    private final BalancerConfiguration balancerConfig;
+    private SslClientProperties sslClientProperties;
+    private ZookeeperProperties zookeeperProperties;
+    private BalancerServerProperties balancerServerProperties;
+    private BalancerHttpProperties balancerHttpProperties;
+    private BalancerWebsocketProperties balancerWebsocketProperties;
+    private ApplicationContext applicationContext;
+    private AuthenticationService authenticationService;
+    private CuratorFramework curatorFramework;
+    private int quietPeriod;
+    private SslContext serverSslContext;
+    private SSLContext clientSSLContext;
     private EventLoopGroup tcpWorkerGroup = null;
     private EventLoopGroup tcpBossGroup = null;
     private EventLoopGroup httpWorkerGroup = null;
@@ -129,57 +136,196 @@ public class Balancer {
     protected Channel httpChannelHandle = null;
     protected Channel wsChannelHandle = null;
     protected List<Channel> udpChannelHandleList = new ArrayList<>();
-    private CuratorFramework curatorFramework;
+    protected int DEFAULT_EVENT_LOOP_THREADS;
-    protected volatile boolean shutdown = false;
-    private static final int DEFAULT_EVENT_LOOP_THREADS;
 
-    private String[] zkPaths = new String[] { LEADER_LATCH_PATH, ASSIGNMENTS_LAST_UPDATED_PATH, ASSIGNMENTS_LOCK_PATH,
+    private String[] zkPaths = new String[] {LEADER_LATCH_PATH, ASSIGNMENTS_LAST_UPDATED_PATH, ASSIGNMENTS_LOCK_PATH, SERVICE_DISCOVERY_PATH,
-            SERVICE_DISCOVERY_PATH, NON_CACHED_METRICS, NON_CACHED_METRICS_LOCK_PATH };
+            NON_CACHED_METRICS, NON_CACHED_METRICS_LOCK_PATH};
 
-    static {
+    private static boolean useEpoll() {
-        DEFAULT_EVENT_LOOP_THREADS = Math.max(1,
+        final String osName = SystemPropertyUtil.get(OS_NAME).toLowerCase().trim();
-                SystemPropertyUtil.getInt("io.netty.eventLoopThreads", NettyRuntime.availableProcessors() * 2));
+        final String osVersion = SystemPropertyUtil.get(OS_VERSION).toLowerCase();
-    }
+        // split at periods, keep the first two, join with a period
-
+        final String majMinVers = StringUtils.join(Arrays.stream(osVersion.split("\\.")).limit(2).collect(Collectors.toList()), ".");
-    public Balancer(BalancerConfiguration balancerConf) throws Exception {
+        if (osName.startsWith("linux")) {
-        this.balancerConfig = balancerConf;
+            try {
-    }
+                Runtime.Version currentVersion = Runtime.Version.parse(majMinVers);
-
+                Runtime.Version epollMinVersion = Runtime.Version.parse(EPOLL_MIN_VERSION);
-    protected static ConfigurableApplicationContext initializeConfiguration(String[] args) {
+                return currentVersion.compareTo(epollMinVersion) > 0;
-        return new SpringApplicationBuilder(SpringBootstrap.class).web(WebApplicationType.NONE).run(args);
+            } catch (Exception e) {
-    }
+                log.error(e.getMessage(), e);
-
-    private void shutdownHook() {
-
-        final Runnable shutdownRunner = () -> {
-            if (!shutdown) {
-                shutdown();
             }
-        };
+        }
-        final Thread hook = new Thread(shutdownRunner, "shutdown-hook-thread");
+        return false;
-        Runtime.getRuntime().addShutdownHook(hook);
+    }
+
+    public Balancer(ApplicationContext applicationContext, SslContext serverSslContext, SSLContext clientSSLContext,
+                    AuthenticationService authenticationService, MetricResolver metricResolver, BalancerProperties balancerProperties,
+                    ZookeeperProperties zookeeperProperties, SecurityProperties securityProperties, SslServerProperties sslServerProperties,
+                    SslClientProperties sslClientProperties, BalancerServerProperties balancerServerProperties, BalancerHttpProperties balancerHttpProperties,
+                    BalancerWebsocketProperties balancerWebsocketProperties) {
+        this.serverSslContext = serverSslContext;
+        this.clientSSLContext = clientSSLContext;
+        this.quietPeriod = balancerServerProperties.getShutdownQuietPeriod();
+        this.applicationContext = applicationContext;
+        this.authenticationService = authenticationService;
+        this.metricResolver = metricResolver;
+        this.balancerProperties = balancerProperties;
+        this.zookeeperProperties = zookeeperProperties;
+        this.securityProperties = securityProperties;
+        this.sslServerProperties = sslServerProperties;
+        this.sslClientProperties = sslClientProperties;
+        this.balancerServerProperties = balancerServerProperties;
+        this.balancerHttpProperties = balancerHttpProperties;
+        this.balancerWebsocketProperties = balancerWebsocketProperties;
+        DEFAULT_EVENT_LOOP_THREADS = Math.max(1, SystemPropertyUtil.getInt("io.netty.eventLoopThreads", NettyRuntime.availableProcessors() * 2));
+    }
+
+    public void start() {
+        log.info("Starting {}", this.getClass().getSimpleName());
+        try {
+            // start curator framework
+            RetryPolicy retryPolicy = new RetryForever(1000);
+            int timeout = Long.valueOf(getTimeInMillis(zookeeperProperties.getTimeout())).intValue();
+            curatorFramework = CuratorFrameworkFactory.newClient(zookeeperProperties.getServers(), timeout, 10000, retryPolicy);
+            curatorFramework.start();
+            ensureZkPaths(curatorFramework, zkPaths);
+
+            JWTTokenHandler.init(securityProperties, null);
+            final boolean useEpoll = useEpoll();
+            Class<? extends ServerSocketChannel> channelClass;
+            Class<? extends Channel> datagramChannelClass;
+            if (useEpoll) {
+                tcpWorkerGroup = new EpollEventLoopGroup();
+                tcpBossGroup = new EpollEventLoopGroup();
+                httpWorkerGroup = new EpollEventLoopGroup();
+                httpBossGroup = new EpollEventLoopGroup();
+                wsWorkerGroup = new EpollEventLoopGroup();
+                wsBossGroup = new EpollEventLoopGroup();
+                udpWorkerGroup = new EpollEventLoopGroup();
+                udpBossGroup = new EpollEventLoopGroup();
+                channelClass = EpollServerSocketChannel.class;
+                datagramChannelClass = EpollDatagramChannel.class;
+            } else {
+                tcpWorkerGroup = new NioEventLoopGroup();
+                tcpBossGroup = new NioEventLoopGroup();
+                httpWorkerGroup = new NioEventLoopGroup();
+                httpBossGroup = new NioEventLoopGroup();
+                wsWorkerGroup = new NioEventLoopGroup();
+                wsBossGroup = new NioEventLoopGroup();
+                udpWorkerGroup = new NioEventLoopGroup();
+                udpBossGroup = new NioEventLoopGroup();
+                channelClass = NioServerSocketChannel.class;
+                datagramChannelClass = NioDatagramChannel.class;
+            }
+            log.info("Using channel class {}", channelClass.getSimpleName());
+
+            final ServerBootstrap tcpServer = new ServerBootstrap();
+            tcpServer.group(tcpBossGroup, tcpWorkerGroup);
+            tcpServer.channel(channelClass);
+            tcpServer.handler(new LoggingHandler());
+            TcpClientPool tcpClientPool = new TcpClientPool(balancerServerProperties);
+            tcpServer.childHandler(setupTcpChannel(metricResolver, tcpClientPool));
+            tcpServer.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
+            tcpServer.option(ChannelOption.SO_BACKLOG, 128);
+            tcpServer.childOption(ChannelOption.SO_KEEPALIVE, true);
+            final int tcpPort = balancerServerProperties.getTcpPort();
+            final String tcpIp = balancerServerProperties.getIp();
+            tcpChannelHandle = bind(tcpServer, tcpIp, tcpPort);
+            final String tcpAddress = ((InetSocketAddress) tcpChannelHandle.localAddress()).getAddress().getHostAddress();
+
+            final int httpPort = balancerHttpProperties.getPort();
+            final String httpIp = balancerHttpProperties.getIp();
+
+            if (serverSslContext instanceof OpenSslServerContext) {
+                OpenSslServerContext openssl = (OpenSslServerContext) serverSslContext;
+                String application = "Timely_" + httpPort;
+                OpenSslServerSessionContext opensslCtx = openssl.sessionContext();
+                opensslCtx.setSessionCacheEnabled(true);
+                opensslCtx.setSessionCacheSize(128);
+                opensslCtx.setSessionIdContext(application.getBytes(StandardCharsets.UTF_8));
+                opensslCtx.setSessionTimeout(securityProperties.getSessionMaxAge());
+            }
+            final ServerBootstrap httpServer = new ServerBootstrap();
+            httpServer.group(httpBossGroup, httpWorkerGroup);
+            httpServer.channel(channelClass);
+            httpServer.handler(new LoggingHandler());
+            HttpClientPool httpClientPool = new HttpClientPool(balancerHttpProperties, clientSSLContext, sslClientProperties);
+            httpServer.childHandler(setupHttpChannel(balancerHttpProperties, sslServerProperties, serverSslContext, metricResolver, httpClientPool));
+            httpServer.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
+            httpServer.option(ChannelOption.SO_BACKLOG, 128);
+            httpServer.childOption(ChannelOption.SO_KEEPALIVE, true);
+            httpChannelHandle = bind(httpServer, httpIp, httpPort);
+            final String httpAddress = ((InetSocketAddress) httpChannelHandle.localAddress()).getAddress().getHostAddress();
+
+            final int wsPort = balancerWebsocketProperties.getPort();
+            final String wsIp = balancerWebsocketProperties.getIp();
+            final ServerBootstrap wsServer = new ServerBootstrap();
+            wsServer.group(wsBossGroup, wsWorkerGroup);
+            wsServer.channel(channelClass);
+            wsServer.handler(new LoggingHandler());
+            WsClientPool wsClientPool = new WsClientPool(balancerProperties, balancerWebsocketProperties, sslClientProperties, clientSSLContext);
+            wsServer.childHandler(setupWSChannel(balancerWebsocketProperties, securityProperties, serverSslContext, metricResolver, wsClientPool));
+            wsServer.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
+            wsServer.option(ChannelOption.SO_BACKLOG, 128);
+            wsServer.childOption(ChannelOption.SO_KEEPALIVE, true);
+            wsChannelHandle = bind(wsServer, wsIp, wsPort);
+            final String wsAddress = ((InetSocketAddress) wsChannelHandle.localAddress()).getAddress().getHostAddress();
+
+            final int udpPort = balancerServerProperties.getUdpPort();
+            final String udpIp = balancerServerProperties.getIp();
+            UdpClientPool udpClientPool = new UdpClientPool(balancerServerProperties);
+            for (int n = 0; n < DEFAULT_EVENT_LOOP_THREADS; n++) {
+                final Bootstrap udpServer = new Bootstrap();
+                udpServer.group(udpBossGroup);
+                udpServer.channel(datagramChannelClass);
+                udpServer.handler(setupUdpChannel(metricResolver, udpClientPool));
+                udpServer.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
+                udpServer.option(EpollChannelOption.SO_REUSEADDR, true);
+                udpServer.option(EpollChannelOption.SO_REUSEPORT, true);
+                udpChannelHandleList.add(bind(udpServer, udpIp, udpPort));
+            }
+            log.info("Balancer started. Listening on {}:{} for TCP traffic, {}:{} for HTTP traffic, {}:{} for WebSocket traffic, and {}:{} for UDP traffic",
+                            tcpAddress, tcpPort, httpAddress, httpPort, wsAddress, wsPort, wsAddress, udpPort);
+        } catch (Exception e) {
+            log.error(e.getMessage(), e);
+            SpringApplication.exit(applicationContext, () -> 0);
+        }
+    }
+
+    protected Channel bind(AbstractBootstrap server, String ip, int port) {
+        Channel channel = null;
+        try {
+            channel = server.bind(ip, port).sync().channel();
+        } catch (InterruptedException e) {
+            log.error("Failed to bind to {}:{} -- {}", ip, port, e.getMessage());
+        }
+        if (channel == null) {
+            throw new IllegalStateException("Failed to bind to port:" + ip + ":" + port);
+        }
+        return channel;
     }
 
     public void shutdown() {
         List<ChannelFuture> channelFutures = new ArrayList<>();
 
         if (tcpChannelHandle != null) {
-            LOG.info("Closing tcpChannelHandle");
+            log.info("Closing tcpChannelHandle");
             channelFutures.add(tcpChannelHandle.close());
         }
 
         if (httpChannelHandle != null) {
-            LOG.info("Closing httpChannelHandle");
+            log.info("Closing httpChannelHandle");
             channelFutures.add(httpChannelHandle.close());
         }
 
         if (wsChannelHandle != null) {
-            LOG.info("Closing wsChannelHandle");
+            log.info("Closing wsChannelHandle");
             channelFutures.add(wsChannelHandle.close());
         }
 
+        int udpChannel = 1;
         for (Channel c : udpChannelHandleList) {
-            LOG.info("Closing udpChannelHandle");
+            log.info("Closing udpChannelHandle #" + udpChannel++);
             channelFutures.add(c.close());
         }
 
@@ -188,51 +334,49 @@ public class Balancer {
             try {
                 f.get();
             } catch (final Exception e) {
-                LOG.error("Error while shutting down channel: {}", f.channel().config());
+                log.error("Channel:" + f.channel().config() + " -> " + e.getMessage(), e);
-                LOG.error("{}", e.getMessage());
-                e.printStackTrace();
             }
         });
 
-        Integer quietPeriod = balancerConfig.getServer().getShutdownQuietPeriod();
         List<Future<?>> groupFutures = new ArrayList<>();
+
         if (tcpBossGroup != null) {
-            LOG.info("Shutting down tcpBossGroup");
+            log.info("Shutting down tcpBossGroup");
             groupFutures.add(tcpBossGroup.shutdownGracefully(quietPeriod, 10, TimeUnit.SECONDS));
         }
 
         if (tcpWorkerGroup != null) {
-            LOG.info("Shutting down tcpWorkerGroup");
+            log.info("Shutting down tcpWorkerGroup");
             groupFutures.add(tcpWorkerGroup.shutdownGracefully(quietPeriod, 10, TimeUnit.SECONDS));
         }
 
         if (httpBossGroup != null) {
-            LOG.info("Shutting down httpBossGroup");
+            log.info("Shutting down httpBossGroup");
             groupFutures.add(httpBossGroup.shutdownGracefully(quietPeriod, 10, TimeUnit.SECONDS));
         }
 
         if (httpWorkerGroup != null) {
-            LOG.info("Shutting down httpWorkerGroup");
+            log.info("Shutting down httpWorkerGroup");
             groupFutures.add(httpWorkerGroup.shutdownGracefully(quietPeriod, 10, TimeUnit.SECONDS));
         }
 
         if (wsBossGroup != null) {
-            LOG.info("Shutting down wsBossGroup");
+            log.info("Shutting down wsBossGroup");
             groupFutures.add(wsBossGroup.shutdownGracefully(quietPeriod, 10, TimeUnit.SECONDS));
         }
 
         if (wsWorkerGroup != null) {
-            LOG.info("Shutting down wsWorkerGroup");
+            log.info("Shutting down wsWorkerGroup");
             groupFutures.add(wsWorkerGroup.shutdownGracefully(quietPeriod, 10, TimeUnit.SECONDS));
         }
 
         if (udpBossGroup != null) {
-            LOG.info("Shutting down udpBossGroup");
+            log.info("Shutting down udpBossGroup");
             groupFutures.add(udpBossGroup.shutdownGracefully(quietPeriod, 10, TimeUnit.SECONDS));
         }
 
         if (udpWorkerGroup != null) {
-            LOG.info("Shutting down udpWorkerGroup");
+            log.info("Shutting down udpWorkerGroup");
             groupFutures.add(udpWorkerGroup.shutdownGracefully(quietPeriod, 10, TimeUnit.SECONDS));
         }
 
@@ -240,106 +384,17 @@ public class Balancer {
             try {
                 f.get();
             } catch (final Exception e) {
-                LOG.error("Error while shutting down group: {}", f.toString());
+                log.error("Group:" + f.toString() + " -> " + e.getMessage(), e);
-                LOG.error("{}", e.getMessage());
-                e.printStackTrace();
             }
         });
 
         try {
-            LOG.info("Closing WebSocketRequestDecoder");
+            log.info("Closing WebSocketRequestDecoder");
             WebSocketRequestDecoder.close();
         } catch (Exception e) {
-            LOG.error("Error closing WebSocketRequestDecoder during shutdown", e);
+            log.error("Error closing WebSocketRequestDecoder during shutdown", e);
         }
-
+        log.info("{} shut down.", this.getClass().getSimpleName());
-        if (applicationContext != null) {
-            LOG.info("Closing applicationContext");
-            applicationContext.close();
-        }
-
-        if (curatorFramework != null) {
-            curatorFramework.close();
-        }
-        this.shutdown = true;
-        LOG.info("Server shut down.");
-    }
-
-    private static boolean useEpoll() {
-
-        // Should we just return true if this is Linux and if we get an error
-        // during Epoll
-        // setup handle it there?
-        final String os = SystemPropertyUtil.get(OS_NAME).toLowerCase().trim();
-        final String[] version = SystemPropertyUtil.get(OS_VERSION).toLowerCase().trim().split("\\.");
-        if (os.startsWith("linux") && version.length >= 3) {
-            final int major = Integer.parseInt(version[0]);
-            if (major > EPOLL_MIN_MAJOR_VERSION) {
-                return true;
-            } else if (major == EPOLL_MIN_MAJOR_VERSION) {
-                final int minor = Integer.parseInt(version[1]);
-                if (minor > EPOLL_MIN_MINOR_VERSION) {
-                    return true;
-                } else if (minor == EPOLL_MIN_MINOR_VERSION) {
-                    final int patch = Integer.parseInt(version[2].substring(0, 2));
-                    return patch >= EPOLL_MIN_PATCH_VERSION;
-                } else {
-                    return false;
-                }
-            } else {
-                return false;
-            }
-        } else {
-            return false;
-        }
-    }
-
-    protected SslContext createSSLContext(BalancerConfiguration config) throws Exception {
-
-        ServerSsl sslCfg = config.getSecurity().getServerSsl();
-        Boolean generate = sslCfg.isUseGeneratedKeypair();
-        SslContextBuilder ssl;
-        if (generate) {
-            LOG.warn("Using generated self signed server certificate");
-            Date begin = new Date();
-            Date end = new Date(begin.getTime() + 86400000);
-            SelfSignedCertificate ssc = new SelfSignedCertificate("localhost", begin, end);
-            ssl = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey());
-        } else {
-            String cert = sslCfg.getCertificateFile();
-            String key = sslCfg.getKeyFile();
-            String keyPass = sslCfg.getKeyPassword();
-            if (null == cert || null == key) {
-                throw new IllegalArgumentException("Check your SSL properties, something is wrong.");
-            }
-            ssl = SslContextBuilder.forServer(new File(cert), new File(key), keyPass);
-        }
-
-        ssl.ciphers(sslCfg.getUseCiphers());
-
-        // Can't set to REQUIRE because the CORS pre-flight requests will fail.
-        ssl.clientAuth(ClientAuth.OPTIONAL);
-
-        Boolean useOpenSSL = sslCfg.isUseOpenssl();
-        if (useOpenSSL) {
-            ssl.sslProvider(SslProvider.OPENSSL);
-        } else {
-            ssl.sslProvider(SslProvider.JDK);
-        }
-        String trustStore = sslCfg.getTrustStoreFile();
-        if (null != trustStore) {
-            if (!trustStore.isEmpty()) {
-                ssl.trustManager(new File(trustStore));
-            }
-        }
-        return ssl.build();
-    }
-
-    protected SSLContext createSSLClientContext(BalancerConfiguration config) throws Exception {
-
-        ClientSsl ssl = config.getSecurity().getClientSsl();
-        return HttpClient.getSSLContext(ssl.getTrustStoreFile(), ssl.getTrustStoreType(), ssl.getTrustStorePassword(),
-                ssl.getKeyFile(), ssl.getKeyType(), ssl.getKeyPassword());
     }
 
     private void ensureZkPaths(CuratorFramework curatorFramework, String[] paths) {
@@ -347,182 +402,38 @@ public class Balancer {
             try {
                 Stat stat = curatorFramework.checkExists().forPath(s);
                 if (stat == null) {
-                    curatorFramework.create().creatingParentContainersIfNeeded().withMode(CreateMode.PERSISTENT)
+                    curatorFramework.create().creatingParentContainersIfNeeded().withMode(CreateMode.PERSISTENT).forPath(s);
-                            .forPath(s);
                 }
             } catch (Exception e) {
-                LOG.info(e.getMessage());
+                log.info(e.getMessage());
             }
 
         }
     }
 
-    public void run() throws Exception {
+    protected ChannelHandler setupHttpChannel(BalancerHttpProperties balancerHttpProperties, SslServerProperties sslServerProperties, SslContext sslCtx,
-
+                    MetricResolver metricResolver, HttpClientPool httpClientPool) {
-        // start curator framework
-        RetryPolicy retryPolicy = new RetryForever(1000);
-        int timeout = Long.valueOf(AccumuloConfiguration.getTimeInMillis(balancerConfig.getZooKeeper().getTimeout()))
-                .intValue();
-        curatorFramework = CuratorFrameworkFactory.newClient(balancerConfig.getZooKeeper().getServers(), timeout, 10000,
-                retryPolicy);
-        curatorFramework.start();
-        ensureZkPaths(curatorFramework, zkPaths);
-
-        AuthCache.configure(balancerConfig.getSecurity());
-        final boolean useEpoll = useEpoll();
-        Class<? extends ServerSocketChannel> channelClass;
-        Class<? extends Channel> datagramChannelClass;
-        if (useEpoll) {
-            tcpWorkerGroup = new EpollEventLoopGroup();
-            tcpBossGroup = new EpollEventLoopGroup();
-            httpWorkerGroup = new EpollEventLoopGroup();
-            httpBossGroup = new EpollEventLoopGroup();
-            wsWorkerGroup = new EpollEventLoopGroup();
-            wsBossGroup = new EpollEventLoopGroup();
-            udpWorkerGroup = new EpollEventLoopGroup();
-            udpBossGroup = new EpollEventLoopGroup();
-            channelClass = EpollServerSocketChannel.class;
-            datagramChannelClass = EpollDatagramChannel.class;
-        } else {
-            tcpWorkerGroup = new NioEventLoopGroup();
-            tcpBossGroup = new NioEventLoopGroup();
-            httpWorkerGroup = new NioEventLoopGroup();
-            httpBossGroup = new NioEventLoopGroup();
-            wsWorkerGroup = new NioEventLoopGroup();
-            wsBossGroup = new NioEventLoopGroup();
-            udpWorkerGroup = new NioEventLoopGroup();
-            udpBossGroup = new NioEventLoopGroup();
-            channelClass = NioServerSocketChannel.class;
-            datagramChannelClass = NioDatagramChannel.class;
-        }
-        LOG.info("Using channel class {}", channelClass.getSimpleName());
-
-        List<TcpClientPool> tcpClientPools = new ArrayList<>();
-        for (int x = 0; x < balancerConfig.getServer().getNumTcpPools(); x++) {
-            tcpClientPools.add(new TcpClientPool(this.balancerConfig));
-        }
-        HealthChecker healthChecker = new HealthChecker(this.balancerConfig, tcpClientPools.get(0));
-        this.metricResolver = new BalancedMetricResolver(curatorFramework, this.balancerConfig, healthChecker);
-
-        final ServerBootstrap tcpServer = new ServerBootstrap();
-        tcpServer.group(tcpBossGroup, tcpWorkerGroup);
-        tcpServer.channel(channelClass);
-        tcpServer.handler(new LoggingHandler());
-        tcpServer.childHandler(setupTcpChannel(metricResolver, tcpClientPools));
-        tcpServer.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
-        tcpServer.option(ChannelOption.SO_BACKLOG, 128);
-        tcpServer.option(ChannelOption.SO_KEEPALIVE, true);
-        final int tcpPort = balancerConfig.getServer().getTcpPort();
-        final String tcpIp = balancerConfig.getServer().getIp();
-        tcpChannelHandle = tcpServer.bind(tcpIp, tcpPort).sync().channel();
-        final String tcpAddress = ((InetSocketAddress) tcpChannelHandle.localAddress()).getAddress().getHostAddress();
-
-        final int httpPort = balancerConfig.getHttp().getPort();
-        final String httpIp = balancerConfig.getHttp().getIp();
-        SslContext sslCtx = createSSLContext(balancerConfig);
-        if (sslCtx instanceof OpenSslServerContext) {
-            OpenSslServerContext openssl = (OpenSslServerContext) sslCtx;
-            String application = "Timely_" + httpPort;
-            OpenSslServerSessionContext opensslCtx = openssl.sessionContext();
-            opensslCtx.setSessionCacheEnabled(true);
-            opensslCtx.setSessionCacheSize(128);
-            opensslCtx.setSessionIdContext(application.getBytes(StandardCharsets.UTF_8));
-            opensslCtx.setSessionTimeout(balancerConfig.getSecurity().getSessionMaxAge());
-        }
-        SSLContext clientSSLContext = createSSLClientContext(balancerConfig);
-        final ServerBootstrap httpServer = new ServerBootstrap();
-        httpServer.group(httpBossGroup, httpWorkerGroup);
-        httpServer.channel(channelClass);
-        httpServer.handler(new LoggingHandler());
-        HttpClientPool httpClientPool = new HttpClientPool(balancerConfig.getSecurity(), balancerConfig.getHttp(),
-                clientSSLContext);
-        httpServer.childHandler(setupHttpChannel(balancerConfig, sslCtx, metricResolver, httpClientPool));
-        httpServer.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
-        httpServer.option(ChannelOption.SO_BACKLOG, 128);
-        httpServer.option(ChannelOption.SO_KEEPALIVE, true);
-        httpChannelHandle = httpServer.bind(httpIp, httpPort).sync().channel();
-        final String httpAddress = ((InetSocketAddress) httpChannelHandle.localAddress()).getAddress().getHostAddress();
-
-        final int wsPort = balancerConfig.getWebsocket().getPort();
-        final String wsIp = balancerConfig.getWebsocket().getIp();
-        final ServerBootstrap wsServer = new ServerBootstrap();
-        wsServer.group(wsBossGroup, wsWorkerGroup);
-        wsServer.channel(channelClass);
-        wsServer.handler(new LoggingHandler());
-        WsClientPool wsClientPool = new WsClientPool(balancerConfig, clientSSLContext);
-        wsServer.childHandler(setupWSChannel(balancerConfig, sslCtx, metricResolver, wsClientPool));
-        wsServer.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
-        wsServer.option(ChannelOption.SO_BACKLOG, 128);
-        wsServer.option(ChannelOption.SO_KEEPALIVE, true);
-        /* Not sure if next two lines are necessary */
-        wsServer.option(ChannelOption.SO_SNDBUF, 1048576);
-        wsServer.option(ChannelOption.WRITE_BUFFER_WATER_MARK, new WriteBufferWaterMark(620145, 838860));
-        wsChannelHandle = wsServer.bind(wsIp, wsPort).sync().channel();
-        final String wsAddress = ((InetSocketAddress) wsChannelHandle.localAddress()).getAddress().getHostAddress();
-
-        final int udpPort = balancerConfig.getServer().getUdpPort();
-        final String udpIp = balancerConfig.getServer().getIp();
-        UdpClientPool udpClientPool = new UdpClientPool(balancerConfig);
-        for (int n = 1; n < DEFAULT_EVENT_LOOP_THREADS; n++) {
-            final Bootstrap udpServer = new Bootstrap();
-            udpServer.group(udpBossGroup);
-            udpServer.channel(datagramChannelClass);
-            udpServer.handler(setupUdpChannel(metricResolver, udpClientPool));
-            udpServer.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
-            udpServer.option(EpollChannelOption.SO_REUSEADDR, true);
-            udpServer.option(EpollChannelOption.SO_REUSEPORT, true);
-            udpChannelHandleList.add(udpServer.bind(udpIp, udpPort).sync().channel());
-        }
-        shutdownHook();
-        LOG.info(
-                "Server started. Listening on {}:{} for TCP traffic, {}:{} for HTTP traffic, {}:{} for WebSocket traffic, and {}:{} for UDP traffic",
-                tcpAddress, tcpPort, httpAddress, httpPort, wsAddress, wsPort, wsAddress, udpPort);
-    }
-
-    public static void main(String[] args) throws Exception {
-
-        Balancer.applicationContext = Balancer.initializeConfiguration(args);
-        BalancerConfiguration balancerConf = applicationContext.getBean(BalancerConfiguration.class);
-
-        Balancer b = new Balancer(balancerConf);
-        try {
-            b.run();
-            LATCH.await();
-        } catch (final InterruptedException e) {
-            LOG.info("Server shutting down.");
-        } catch (Exception e) {
-            LOG.error("Error running server.", e);
-        } finally {
-            try {
-                b.shutdown();
-            } catch (Exception e) {
-                System.exit(1);
-            }
-        }
-    }
-
-    protected ChannelHandler setupHttpChannel(BalancerConfiguration balancerConfig, SslContext sslCtx,
-            MetricResolver metricResolver, HttpClientPool httpClientPool) {
 
         return new ChannelInitializer<SocketChannel>() {
 
             @Override
-            protected void initChannel(SocketChannel ch) throws Exception {
+            protected void initChannel(SocketChannel ch) {
 
-                ch.pipeline().addLast("ssl", new NonSslRedirectHandler(balancerConfig.getHttp(), sslCtx));
+                ch.pipeline().addLast("nonsslforbidden", new NonSslForbiddenHandler(sslCtx));
                 ch.pipeline().addLast("encoder", new HttpResponseEncoder());
-                ch.pipeline().addLast("decoder", new HttpRequestDecoder());
+                ch.pipeline().addLast("strict", new HttpStrictTransportSecurityHandler(balancerHttpProperties));
+                ch.pipeline().addLast("decoder", new HttpRequestDecoder(4096, 32768, 8192, true, 128));
                 ch.pipeline().addLast("compressor", new HttpContentCompressor());
                 ch.pipeline().addLast("decompressor", new HttpContentDecompressor());
                 ch.pipeline().addLast("aggregator", new HttpObjectAggregator(65536));
                 ch.pipeline().addLast("chunker", new ChunkedWriteHandler());
-                ch.pipeline().addLast("queryDecoder", new timely.netty.http.HttpRequestDecoder(
+                ch.pipeline().addLast("queryDecoder",
-                        balancerConfig.getSecurity(), balancerConfig.getHttp()));
+                                new timely.netty.http.HttpRequestDecoder(authenticationService, securityProperties, balancerHttpProperties));
-                ch.pipeline().addLast("fileServer", new HttpStaticFileServerHandler());
+                ch.pipeline().addLast("notfound", new NotFoundHandler());
-                ch.pipeline().addLast("login",
+                ch.pipeline().addLast("login", new X509LoginRequestHandler(authenticationService, securityProperties, balancerHttpProperties));
-                        new X509LoginRequestHandler(balancerConfig.getSecurity(), balancerConfig.getHttp()));
+                ch.pipeline().addLast("version", new HttpVersionRequestHandler());
-                ch.pipeline().addLast("httpRelay", new HttpRelayHandler(metricResolver, httpClientPool));
+                ch.pipeline().addLast("httpRelay", new HttpRelayHandler(balancerHttpProperties, metricResolver, httpClientPool));
-                ch.pipeline().addLast("error", new TimelyExceptionHandler());
+                ch.pipeline().addLast("error", new TimelyExceptionHandler().setIgnoreSslHandshakeErrors(sslServerProperties.isIgnoreSslHandshakeErrors()));
             }
         };
     }
@@ -542,7 +453,7 @@ public class Balancer {
         };
     }
 
-    protected ChannelHandler setupTcpChannel(MetricResolver metricResolver, List<TcpClientPool> tcpClientPools) {
+    protected ChannelHandler setupTcpChannel(MetricResolver metricResolver, TcpClientPool tcpClientPool) {
         return new ChannelInitializer<SocketChannel>() {
 
             @Override
@@ -550,14 +461,14 @@ public class Balancer {
                 ch.pipeline().addLast("buffer", new MetricsBufferDecoder());
                 ch.pipeline().addLast("frame", new DelimiterBasedFrameDecoder(65536, true, Delimiters.lineDelimiter()));
                 ch.pipeline().addLast("putDecoder", new TcpDecoder());
-                ch.pipeline().addLast("tcpRelayHandler", new TcpRelayHandler(metricResolver, tcpClientPools));
+                ch.pipeline().addLast("tcpRelayHandler", new TcpRelayHandler(metricResolver, tcpClientPool));
                 ch.pipeline().addLast("versionHandler", new TcpVersionHandler());
             }
         };
     }
 
-    protected ChannelHandler setupWSChannel(BalancerConfiguration balancerConfig, SslContext sslCtx,
+    protected ChannelHandler setupWSChannel(BalancerWebsocketProperties balancerWebsocketProperties, SecurityProperties securityProperties, SslContext sslCtx,
-            MetricResolver metricResolver, WsClientPool wsClientPool) {
+                    MetricResolver metricResolver, WsClientPool wsClientPool) {
         return new ChannelInitializer<SocketChannel>() {
 
             @Override
@@ -565,14 +476,12 @@ public class Balancer {
                 ch.pipeline().addLast("ssl", sslCtx.newHandler(ch.alloc()));
                 ch.pipeline().addLast("httpServer", new HttpServerCodec());
                 ch.pipeline().addLast("aggregator", new HttpObjectAggregator(65536));
-                ch.pipeline().addLast("sessionExtractor", new WebSocketFullRequestHandler());
+                ch.pipeline().addLast("sessionExtractor", new WebSocketFullRequestHandler(authenticationService));
 
-                ch.pipeline().addLast("idle-handler",
+                ch.pipeline().addLast("idle-handler", new IdleStateHandler(balancerWebsocketProperties.getTimeout(), 0, 0));
-                        new IdleStateHandler(balancerConfig.getWebsocket().getTimeout(), 0, 0));
+                ch.pipeline().addLast("ws-protocol", new WebSocketServerProtocolHandler(WS_PATH, null, true, 65536, false, true));
-                ch.pipeline().addLast("ws-protocol",
+                ch.pipeline().addLast("wsDecoder", new WebSocketRequestDecoder(authenticationService, securityProperties));
-                        new WebSocketServerProtocolHandler(WS_PATH, null, true, 65536, false, true));
+                ch.pipeline().addLast("httpRelay", new WsRelayHandler(balancerWebsocketProperties, metricResolver, wsClientPool));
-                ch.pipeline().addLast("wsDecoder", new WebSocketRequestDecoder(balancerConfig.getSecurity()));
-                ch.pipeline().addLast("httpRelay", new WsRelayHandler(balancerConfig, metricResolver, wsClientPool));
                 ch.pipeline().addLast("error", new WSTimelyExceptionHandler());
             }
         };

balancer/src/main/java/timely/balancer/HealthChecker.java

@@ -0,0 +1,72 @@
+package timely.balancer;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import timely.balancer.configuration.BalancerProperties;
+import timely.balancer.configuration.BalancerServerProperties;
+import timely.balancer.connection.TimelyBalancedHost;
+import timely.balancer.connection.tcp.TcpClientPool;
+import timely.balancer.healthcheck.TCPServerHealthCheck;
+
+public class HealthChecker {
+
+    private static final Logger log = LoggerFactory.getLogger(HealthChecker.class);
+    private ScheduledExecutorService executorService = Executors.newScheduledThreadPool(1);
+    private TCPServerHealthCheck tcpServerHealthCheck;
+    private BalancerProperties balancerProperties;
+    private BalancerServerProperties balancerServerProperties;
+    protected List<TimelyBalancedHost> timelyHosts = new ArrayList<>();
+
+    public HealthChecker(BalancerProperties balancerProperties, BalancerServerProperties balancerServerProperties) {
+        this.balancerProperties = balancerProperties;
+        this.balancerServerProperties = balancerServerProperties;
+    }
+
+    public void start() {
+        TcpClientPool tcpClientPool = new TcpClientPool(balancerServerProperties);
+        this.tcpServerHealthCheck = new TCPServerHealthCheck(tcpClientPool);
+        this.executorService.scheduleAtFixedRate(() -> {
+            synchronized (timelyHosts) {
+                for (TimelyBalancedHost h : timelyHosts) {
+                    try {
+                        if (tcpServerHealthCheck.isServerHealthy(h)) {
+                            h.reportSuccess();
+                        } else {
+                            h.reportFailure();
+                        }
+                    } catch (Exception e) {
+                        log.error(e.getMessage(), e);
+                        h.reportFailure();
+                    }
+                }
+            }
+        }, 0, balancerProperties.getCheckServerHealthInterval(), TimeUnit.MILLISECONDS);
+    }
+
+    public void shutdown() {
+        this.executorService.shutdown();
+        try {
+            this.executorService.awaitTermination(5, TimeUnit.SECONDS);
+        } catch (InterruptedException e) {
+
+        } finally {
+            if (!this.executorService.isTerminated()) {
+                this.executorService.shutdownNow();
+            }
+        }
+    }
+
+    public void setTimelyHosts(List<TimelyBalancedHost> timelyHosts) {
+        synchronized (timelyHosts) {
+            this.timelyHosts.clear();
+            this.timelyHosts.addAll(timelyHosts);
+        }
+    }
+}

balancer/src/main/java/timely/balancer/MetricResolver.java

@@ -1,12 +1,15 @@
-package timely.balancer.resolver;
+package timely.balancer;
 
-import static timely.Server.SERVICE_DISCOVERY_PATH;
+import static org.apache.hadoop.fs.FileSystem.FS_DEFAULT_NAME_KEY;
+import static timely.Constants.NON_CACHED_METRICS;
+import static timely.Constants.NON_CACHED_METRICS_LOCK_PATH;
+import static timely.Constants.SERVICE_DISCOVERY_PATH;
 import static timely.balancer.Balancer.ASSIGNMENTS_LAST_UPDATED_PATH;
 import static timely.balancer.Balancer.ASSIGNMENTS_LOCK_PATH;
 import static timely.balancer.Balancer.LEADER_LATCH_PATH;
-import static timely.store.cache.DataStoreCache.NON_CACHED_METRICS;
-import static timely.store.cache.DataStoreCache.NON_CACHED_METRICS_LOCK_PATH;
 
+import java.io.FileNotFoundException;
+import java.io.IOException;
 import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -19,19 +22,17 @@ import java.util.List;
 import java.util.Map;
 import java.util.Random;
 import java.util.Set;
-import java.util.Timer;
-import java.util.TimerTask;
 import java.util.TreeMap;
 import java.util.TreeSet;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
-import com.csvreader.CsvReader;
-import com.csvreader.CsvWriter;
-import org.apache.commons.lang.StringUtils;
 import org.apache.commons.lang3.SerializationUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.curator.framework.CuratorFramework;
 import org.apache.curator.framework.recipes.atomic.DistributedAtomicLong;
 import org.apache.curator.framework.recipes.atomic.DistributedAtomicValue;
@@ -51,65 +52,79 @@ import org.apache.curator.x.discovery.details.ServiceCacheListener;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FSDataInputStream;
 import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.zookeeper.CreateMode;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
+import com.csvreader.CsvReader;
+import com.csvreader.CsvWriter;
+
 import timely.ServerDetails;
-import timely.balancer.ArrivalRate;
+import timely.balancer.configuration.BalancerProperties;
-import timely.balancer.configuration.BalancerConfiguration;
 import timely.balancer.connection.TimelyBalancedHost;
-import timely.balancer.healthcheck.HealthChecker;
+import timely.common.configuration.CacheProperties;
 
-public class BalancedMetricResolver implements MetricResolver {
+public class MetricResolver {
 
-    private static final Logger LOG = LoggerFactory.getLogger(BalancedMetricResolver.class);
+    private static final Logger log = LoggerFactory.getLogger(MetricResolver.class);
-    private Map<String, TimelyBalancedHost> metricToHostMap = new TreeMap<>();
-    private Map<String, ArrivalRate> metricMap = new HashMap<>();
     private ReentrantReadWriteLock balancerLock = new ReentrantReadWriteLock();
-    private List<TimelyBalancedHost> serverList = new ArrayList<>();
     private Random r = new Random();
-    final private HealthChecker healthChecker;
+    private ScheduledExecutorService assignmentExecutor = Executors.newScheduledThreadPool(2);
-    private Timer timer = new Timer("RebalanceTimer", true);
+    private ScheduledExecutorService arrivalRateExecutor = Executors.newScheduledThreadPool(2);
-    private Timer arrivalRateTimer = new Timer("ArrivalRateTimerResolver", true);
     private int roundRobinCounter = 0;
     private Set<String> nonCachedMetrics = new HashSet<>();
     private DistributedAtomicValue nonCachedMetricsIP;
     private ReentrantReadWriteLock nonCachedMetricsLocalLock = new ReentrantReadWriteLock();
     private InterProcessReadWriteLock nonCachedMetricsIPRWLock;
-    private BalancerConfiguration balancerConfig;
     private LeaderLatch leaderLatch;
     private AtomicBoolean isLeader = new AtomicBoolean(false);
     private InterProcessReadWriteLock assignmentsIPRWLock;
     private DistributedAtomicLong assignmentsLastUpdatedInHdfs;
     private AtomicLong assignmentsLastUpdatedLocal = new AtomicLong(0);
+    protected List<TimelyBalancedHost> serverList = new ArrayList<>();
+    protected Map<String,TimelyBalancedHost> metricToHostMap = new TreeMap<>();
+    protected Map<String,ArrivalRate> metricMap = new HashMap<>();
+    final protected CuratorFramework curatorFramework;
+    final protected BalancerProperties balancerProperties;
+    final protected CacheProperties cacheProperties;
+    final protected HealthChecker healthChecker;
+    final protected Path assignmentFile;
+    final protected FileSystem fs;
 
     private enum BalanceType {
         HIGH_LOW, HIGH_AVG, AVG_LOW
     }
 
-    public BalancedMetricResolver(CuratorFramework curatorFramework, BalancerConfiguration balancerConfig,
+    public MetricResolver(CuratorFramework curatorFramework, BalancerProperties balancerProperties, CacheProperties cacheProperties,
-            HealthChecker healthChecker) {
+                    HealthChecker healthChecker) throws Exception {
-        this.balancerConfig = balancerConfig;
+        this.curatorFramework = curatorFramework;
+        this.balancerProperties = balancerProperties;
+        this.cacheProperties = cacheProperties;
         this.healthChecker = healthChecker;
+        this.assignmentFile = new Path(balancerProperties.getAssignmentFile());
+        this.fs = getFileSystem(this.assignmentFile);
+    }
 
+    public void start() {
         assignmentsIPRWLock = new InterProcessReadWriteLock(curatorFramework, ASSIGNMENTS_LOCK_PATH);
         testIPRWLock(curatorFramework, assignmentsIPRWLock, ASSIGNMENTS_LOCK_PATH);
         startLeaderLatch(curatorFramework);
         startServiceListener(curatorFramework);
-        assignmentsLastUpdatedInHdfs = new DistributedAtomicLong(curatorFramework, ASSIGNMENTS_LAST_UPDATED_PATH,
+        assignmentsLastUpdatedInHdfs = new DistributedAtomicLong(curatorFramework, ASSIGNMENTS_LAST_UPDATED_PATH, new RetryForever(1000));
-                new RetryForever(1000));
+        try {
+            assignmentsLastUpdatedInHdfs.forceSet(getLastWrittenToHdfsTimestamp());
+        } catch (Exception e) {
+            log.error(e.getMessage(), e);
+        }
 
-        TreeCacheListener assignmentListener = new TreeCacheListener() {
+        TreeCacheListener assignmentListener = (curframework, event) -> {
-
+            log.debug("Handling assignments event {}. assignmentsLastUpdatedInHdfs:{}", event.getType().toString(),
-            @Override
+                            new Date(assignmentsLastUpdatedInHdfs.get().postValue()));
-            public void childEvent(CuratorFramework curatorFramework, TreeCacheEvent event) throws Exception {
+            if (event.getType().equals(TreeCacheEvent.Type.NODE_UPDATED)) {
-                LOG.debug("Handling assignments event {}. assignmentsLastUpdatedInHdfs:{}", event.getType().toString(),
+                readAssignmentsFromHdfs(true);
-                        new Date(assignmentsLastUpdatedInHdfs.get().postValue()));
-                if (event.getType().equals(TreeCacheEvent.Type.NODE_UPDATED)) {
-                    readAssignmentsFromHdfs(true);
-                }
             }
         };
 
@@ -117,20 +132,16 @@ public class BalancedMetricResolver implements MetricResolver {
             assignmentTreeCache.getListenable().addListener(assignmentListener);
             assignmentTreeCache.start();
         } catch (Exception e) {
-            LOG.error(e.getMessage(), e);
+            log.error(e.getMessage(), e);
         }
 
         nonCachedMetricsIPRWLock = new InterProcessReadWriteLock(curatorFramework, NON_CACHED_METRICS_LOCK_PATH);
         testIPRWLock(curatorFramework, nonCachedMetricsIPRWLock, NON_CACHED_METRICS_LOCK_PATH);
         nonCachedMetricsIP = new DistributedAtomicValue(curatorFramework, NON_CACHED_METRICS, new RetryForever(1000));
-        TreeCacheListener nonCachedMetricsListener = new TreeCacheListener() {
+        TreeCacheListener nonCachedMetricsListener = (framework, event) -> {
-
+            if (event.getType().equals(TreeCacheEvent.Type.NODE_UPDATED)) {
-            @Override
+                log.debug("Handling nonCachedMetricsIP event {}", event.getType().toString());
-            public void childEvent(CuratorFramework curatorFramework, TreeCacheEvent event) throws Exception {
+                readNonCachedMetricsIP();
-                if (event.getType().equals(TreeCacheEvent.Type.NODE_UPDATED)) {
-                    LOG.debug("Handling nonCachedMetricsIP event {}", event.getType().toString());
-                    readNonCachedMetricsIP();
-                }
             }
         };
 
@@ -138,12 +149,12 @@ public class BalancedMetricResolver implements MetricResolver {
             nonCachedMetricsTreeCache.getListenable().addListener(nonCachedMetricsListener);
             nonCachedMetricsTreeCache.start();
         } catch (Exception e) {
-            LOG.error(e.getMessage(), e);
+            log.error(e.getMessage(), e);
         }
 
         nonCachedMetricsLocalLock.writeLock().lock();
         try {
-            addNonCachedMetrics(balancerConfig.getCache().getNonCachedMetrics());
+            addNonCachedMetrics(cacheProperties.getNonCachedMetrics());
         } finally {
             nonCachedMetricsLocalLock.writeLock().unlock();
         }
@@ -151,45 +162,61 @@ public class BalancedMetricResolver implements MetricResolver {
 
         readAssignmentsFromHdfs(false);
 
-        timer.schedule(new TimerTask() {
+        assignmentExecutor.scheduleAtFixedRate(() -> {
-
+            if (isLeader.get()) {
-            @Override
-            public void run() {
-                if (isLeader.get()) {
-                    try {
-                        balance();
-                    } catch (Exception e) {
-                        LOG.error(e.getMessage(), e);
-                    }
-                }
-            }
-        }, 900000, 900000);
-
-        timer.schedule(new TimerTask() {
-
-            @Override
-            public void run() {
                 try {
-                    if (isLeader.get()) {
+                    balance();
-                        long lastLocalUpdate = assignmentsLastUpdatedLocal.get();
-                        long lastHdfsUpdate = assignmentsLastUpdatedInHdfs.get().postValue();
-                        if (lastLocalUpdate > lastHdfsUpdate) {
-                            LOG.debug("Leader writing assignments to hdfs lastLocalUpdate ({}) > lastHdfsUpdate ({})",
-                                    new Date(lastLocalUpdate), new Date(lastHdfsUpdate));
-                            writeAssignmentsToHdfs();
-                        } else {
-                            LOG.trace(
-                                    "Leader not writing assignments to hdfs lastLocalUpdate ({}) <= lastHdfsUpdate ({})",
-                                    new Date(lastLocalUpdate), new Date(lastHdfsUpdate));
-                        }
-                    } else {
-                        readAssignmentsFromHdfs(true);
-                    }
                 } catch (Exception e) {
-                    LOG.error(e.getMessage(), e);
+                    log.error(e.getMessage(), e);
                 }
             }
-        }, 10000, 60000);
+        }, 15, 15, TimeUnit.MINUTES);
+
+        assignmentExecutor.scheduleAtFixedRate(() -> {
+            try {
+                if (isLeader.get()) {
+                    long lastLocalUpdate = assignmentsLastUpdatedLocal.get();
+                    long lastHdfsUpdate = assignmentsLastUpdatedInHdfs.get().postValue();
+                    if (lastLocalUpdate > lastHdfsUpdate) {
+                        log.debug("Leader writing assignments to hdfs lastLocalUpdate ({}) > lastHdfsUpdate ({})", new Date(lastLocalUpdate),
+                                        new Date(lastHdfsUpdate));
+                        writeAssignmentsToHdfs();
+                    } else {
+                        log.trace("Leader not writing assignments to hdfs lastLocalUpdate ({}) <= lastHdfsUpdate ({})", new Date(lastLocalUpdate),
+                                        new Date(lastHdfsUpdate));
+                    }
+                } else {
+                    readAssignmentsFromHdfs(true);
+                }
+            } catch (Exception e) {
+                log.error(e.getMessage(), e);
+            }
+        }, 10, 60, TimeUnit.SECONDS);
+    }
+
+    public void shutdown() {
+
+        this.assignmentExecutor.shutdown();
+        try {
+            this.assignmentExecutor.awaitTermination(5, TimeUnit.SECONDS);
+        } catch (InterruptedException e) {
+
+        } finally {
+            if (!this.assignmentExecutor.isTerminated()) {
+                this.assignmentExecutor.shutdownNow();
+            }
+        }
+
+        this.arrivalRateExecutor.shutdown();
+        try {
+            this.arrivalRateExecutor.awaitTermination(5, TimeUnit.SECONDS);
+        } catch (InterruptedException e) {
+
+        } finally {
+            if (!this.arrivalRateExecutor.isTerminated()) {
+                this.arrivalRateExecutor.shutdownNow();
+            }
+        }
     }
 
     private void readNonCachedMetricsIP() {
@@ -203,34 +230,33 @@ public class BalancedMetricResolver implements MetricResolver {
             byte[] currentNonCachedMetricsDistributedBytes = nonCachedMetricsIP.get().postValue();
             if (currentNonCachedMetricsDistributedBytes != null) {
                 try {
-                    currentNonCachedMetricsDistributed = SerializationUtils
+                    currentNonCachedMetricsDistributed = SerializationUtils.deserialize(currentNonCachedMetricsDistributedBytes);
-                            .deserialize(currentNonCachedMetricsDistributedBytes);
                 } catch (Exception e) {
-                    LOG.error(e.getMessage(), e);
+                    log.error(e.getMessage(), e);
                     currentNonCachedMetricsDistributed = new TreeSet<>();
                 }
             }
         } catch (Exception e) {
-            LOG.error(e.getMessage(), e);
+            log.error(e.getMessage(), e);
         } finally {
             try {
                 nonCachedMetricsIPRWLock.readLock().release();
             } catch (Exception e) {
-                LOG.error(e.getMessage(), e);
+                log.error(e.getMessage(), e);
             }
         }
 
         nonCachedMetricsLocalLock.writeLock().lock();
         try {
             if (nonCachedMetrics.containsAll(currentNonCachedMetricsDistributed)) {
-                LOG.debug("local nonCachedMetrics already contains {}", currentNonCachedMetricsDistributed);
+                log.debug("local nonCachedMetrics already contains {}", currentNonCachedMetricsDistributed);
             } else {
                 currentNonCachedMetricsDistributed.removeAll(nonCachedMetrics);
-                LOG.debug("Adding {} to local nonCachedMetrics", currentNonCachedMetricsDistributed);
+                log.debug("Adding {} to local nonCachedMetrics", currentNonCachedMetricsDistributed);
                 nonCachedMetrics.addAll(currentNonCachedMetricsDistributed);
             }
         } catch (Exception e) {
-            LOG.error(e.getMessage(), e);
+            log.error(e.getMessage(), e);
         } finally {
             nonCachedMetricsLocalLock.writeLock().unlock();
         }
@@ -245,26 +271,26 @@ public class BalancedMetricResolver implements MetricResolver {
 
                 @Override
                 public void isLeader() {
-                    LOG.info("this balancer is the leader");
+                    log.info("this balancer is the leader");
                     isLeader.set(true);
                     writeAssignmentsToHdfs();
                 }
 
                 @Override
                 public void notLeader() {
-                    LOG.info("this balancer is not the leader");
+                    log.info("this balancer is not the leader");
                     isLeader.set(false);
                 }
             });
         } catch (Exception e) {
-            LOG.error(e.getMessage(), e);
+            log.error(e.getMessage(), e);
         }
     }
 
     private void startServiceListener(CuratorFramework curatorFramework) {
         try {
-            ServiceDiscovery<ServerDetails> discovery = ServiceDiscoveryBuilder.builder(ServerDetails.class)
+            ServiceDiscovery<ServerDetails> discovery = ServiceDiscoveryBuilder.builder(ServerDetails.class).client(curatorFramework)
-                    .client(curatorFramework).basePath(SERVICE_DISCOVERY_PATH).build();
+                            .basePath(SERVICE_DISCOVERY_PATH).build();
             discovery.start();
             Collection<ServiceInstance<ServerDetails>> instances = discovery.queryForInstances("timely-server");
 
@@ -272,11 +298,11 @@ public class BalancedMetricResolver implements MetricResolver {
             try {
                 for (ServiceInstance<ServerDetails> si : instances) {
                     ServerDetails pl = si.getPayload();
-                    TimelyBalancedHost tbh = TimelyBalancedHost.of(pl.getHost(), pl.getTcpPort(), pl.getHttpPort(),
+                    TimelyBalancedHost tbh = TimelyBalancedHost.of(pl.getHost(), pl.getTcpPort(), pl.getHttpPort(), pl.getWsPort(), pl.getUdpPort(),
-                            pl.getWsPort(), pl.getUdpPort());
+                                    new ArrivalRate(arrivalRateExecutor));
-                    LOG.info("adding service {} host:{} tcpPort:{} httpPort:{} wsPort:{} udpPort:{}", si.getId(),
+                    log.info("adding service {} host:{} tcpPort:{} httpPort:{} wsPort:{} udpPort:{}", si.getId(), pl.getHost(), pl.getTcpPort(),
-                            pl.getHost(), pl.getTcpPort(), pl.getHttpPort(), pl.getWsPort(), pl.getUdpPort());
+                                    pl.getHttpPort(), pl.getWsPort(), pl.getUdpPort());
-                    tbh.setBalancerConfig(balancerConfig);
+                    tbh.setBalancerProperties(balancerProperties);
                     serverList.add(tbh);
                 }
                 healthChecker.setTimelyHosts(serverList);
@@ -284,8 +310,7 @@ public class BalancedMetricResolver implements MetricResolver {
                 balancerLock.writeLock().unlock();
             }
 
-            final ServiceCache<ServerDetails> serviceCache = discovery.serviceCacheBuilder().name("timely-server")
+            final ServiceCache<ServerDetails> serviceCache = discovery.serviceCacheBuilder().name("timely-server").build();
-                    .build();
             ServiceCacheListener listener = new ServiceCacheListener() {
 
                 @Override
@@ -296,10 +321,10 @@ public class BalancedMetricResolver implements MetricResolver {
                         List<ServiceInstance<ServerDetails>> instances = serviceCache.getInstances();
                         Set<TimelyBalancedHost> availableHosts = new HashSet<>();
                         for (ServiceInstance<ServerDetails> si : instances) {
-                            ServerDetails pl = (ServerDetails) si.getPayload();
+                            ServerDetails pl = si.getPayload();
-                            TimelyBalancedHost tbh = TimelyBalancedHost.of(pl.getHost(), pl.getTcpPort(),
+                            TimelyBalancedHost tbh = TimelyBalancedHost.of(pl.getHost(), pl.getTcpPort(), pl.getHttpPort(), pl.getWsPort(), pl.getUdpPort(),
-                                    pl.getHttpPort(), pl.getWsPort(), pl.getUdpPort());
+                                            new ArrivalRate(arrivalRateExecutor));
-                            tbh.setBalancerConfig(balancerConfig);
+                            tbh.setBalancerProperties(balancerProperties);
                             availableHosts.add(tbh);
                         }
 
@@ -312,10 +337,9 @@ public class BalancedMetricResolver implements MetricResolver {
                                 availableHosts.remove(h);
                             } else {
                                 itr.remove();
-                                LOG.info("removing service {}:{} host:{} tcpPort:{} httpPort:{} wsPort:{} udpPort:{}",
+                                log.info("removing service {}:{} host:{} tcpPort:{} httpPort:{} wsPort:{} udpPort:{}", h.getHost(), h.getTcpPort(), h.getHost(),
-                                        h.getHost(), h.getTcpPort(), h.getHost(), h.getTcpPort(), h.getHttpPort(),
+                                                h.getTcpPort(), h.getHttpPort(), h.getWsPort(), h.getUdpPort());
-                                        h.getWsPort(), h.getUdpPort());
+                                for (Map.Entry<String,TimelyBalancedHost> e : metricToHostMap.entrySet()) {
-                                for (Map.Entry<String, TimelyBalancedHost> e : metricToHostMap.entrySet()) {
                                     if (e.getValue().equals(h)) {
                                         reassignMetrics.add(e.getKey());
                                     }
@@ -326,9 +350,8 @@ public class BalancedMetricResolver implements MetricResolver {
 
                         // add new hosts that were not previously known
                         for (TimelyBalancedHost h : availableHosts) {
-                            LOG.info("adding service {}:{} host:{} tcpPort:{} httpPort:{} wsPort:{} udpPort:{}",
+                            log.info("adding service {}:{} host:{} tcpPort:{} httpPort:{} wsPort:{} udpPort:{}", h.getHost(), h.getTcpPort(), h.getHost(),
-                                    h.getHost(), h.getTcpPort(), h.getHost(), h.getTcpPort(), h.getHttpPort(),
+                                            h.getTcpPort(), h.getHttpPort(), h.getWsPort(), h.getUdpPort());
-                                    h.getWsPort(), h.getUdpPort());
                             serverList.add(h);
                             rebalanceNeeded = true;
                         }
@@ -337,8 +360,13 @@ public class BalancedMetricResolver implements MetricResolver {
                         if (isLeader.get()) {
                             for (String s : reassignMetrics) {
                                 TimelyBalancedHost h = getRoundRobinHost(null);
-                                assignMetric(s, h);
+                                if (h == null) {
-                                LOG.debug("Assigned server removed.  Assigning {} to server {}:{}", s, h.getTcpPort());
+                                    unassignMetric(s);
+                                    log.debug("Assigned server removed and none available. Unassigning {}", s);
+                                } else {
+                                    assignMetric(s, h);
+                                    log.debug("Assigned server removed. Assigning {} to server {}:{}", s, h.getTcpPort());
+                                }
                             }
                         }
 
@@ -355,14 +383,14 @@ public class BalancedMetricResolver implements MetricResolver {
 
                 @Override
                 public void stateChanged(CuratorFramework curatorFramework, ConnectionState connectionState) {
-                    LOG.info("serviceCache state changed.  Connected:{}", connectionState.isConnected());
+                    log.info("serviceCache state changed.  Connected:{}", connectionState.isConnected());
                 }
             };
             serviceCache.addListener(listener);
             serviceCache.start();
 
         } catch (Exception e) {
-            LOG.error(e.getMessage(), e);
+            log.error(e.getMessage(), e);
         }
     }
 
@@ -371,12 +399,12 @@ public class BalancedMetricResolver implements MetricResolver {
         TimelyBalancedHost tbh = null;
         balancerLock.readLock().lock();
         try {
-            Map<Double, TimelyBalancedHost> rateSortedHosts = new TreeMap<>();
+            Map<Double,TimelyBalancedHost> rateSortedHosts = new TreeMap<>();
             for (TimelyBalancedHost s : serverList) {
                 rateSortedHosts.put(s.getArrivalRate(), s);
             }
 
-            Iterator<Map.Entry<Double, TimelyBalancedHost>> itr = rateSortedHosts.entrySet().iterator();
+            Iterator<Map.Entry<Double,TimelyBalancedHost>> itr = rateSortedHosts.entrySet().iterator();
 
             while (itr.hasNext() && tbh == null) {
                 TimelyBalancedHost currentTBH = itr.next().getValue();
@@ -441,11 +469,11 @@ public class BalancedMetricResolver implements MetricResolver {
         return tbh;
     }
 
-    private TimelyBalancedHost chooseHost(Set<TimelyBalancedHost> potentialHosts,
+    private TimelyBalancedHost chooseHost(Set<TimelyBalancedHost> potentialHosts, Map<TimelyBalancedHost,Double> calculatedRates, double referenceRate,
-            Map<TimelyBalancedHost, Double> calculatedRates, double referenceRate, BalanceType balanceType) {
+                    BalanceType balanceType) {
 
         TimelyBalancedHost tbh = null;
-        Map<Long, TimelyBalancedHost> weightedList = new TreeMap<>();
+        Map<Long,TimelyBalancedHost> weightedList = new TreeMap<>();
         long cumulativeWeight = 0;
         for (TimelyBalancedHost h : potentialHosts) {
             double currentDiff;
@@ -460,7 +488,7 @@ public class BalancedMetricResolver implements MetricResolver {
 
         if (cumulativeWeight > 0) {
             long randomWeight = r.nextLong() % cumulativeWeight;
-            for (Map.Entry<Long, TimelyBalancedHost> e : weightedList.entrySet()) {
+            for (Map.Entry<Long,TimelyBalancedHost> e : weightedList.entrySet()) {
                 if (randomWeight <= e.getKey()) {
                     tbh = e.getValue();
                     break;
@@ -474,10 +502,10 @@ public class BalancedMetricResolver implements MetricResolver {
 
         int numReassigned = 0;
         if (isLeader.get()) {
-            double controlBandPercentage = balancerConfig.getControlBandPercentage();
+            double controlBandPercentage = balancerProperties.getControlBandPercentage();
             // save current rates so that we can modify
             double totalArrivalRate = 0;
-            Map<TimelyBalancedHost, Double> calculatedRates = new HashMap<>();
+            Map<TimelyBalancedHost,Double> calculatedRates = new HashMap<>();
             for (TimelyBalancedHost h : serverList) {
                 double tbhArrivalRate = h.getArrivalRate();
                 calculatedRates.put(h, tbhArrivalRate);
@@ -506,34 +534,32 @@ public class BalancedMetricResolver implements MetricResolver {
             }
 
             if (highHosts.isEmpty() && lowHosts.isEmpty()) {
-                LOG.debug("Host's arrival rates are within {} of the average", controlBandPercentage);
+                log.debug("Host's arrival rates are within {} of the average", controlBandPercentage);
             } else if (!highHosts.isEmpty() && !lowHosts.isEmpty()) {
-                LOG.debug("begin rebalancing {}", BalanceType.HIGH_LOW);
+                log.debug("begin rebalancing {}", BalanceType.HIGH_LOW);
-                numReassigned = rebalance(highHosts, lowHosts, calculatedRates, averageArrivalRate,
+                numReassigned = rebalance(highHosts, lowHosts, calculatedRates, averageArrivalRate, BalanceType.HIGH_LOW);
-                        BalanceType.HIGH_LOW);
+                log.debug("end rebalancing {} - reassigned {}", BalanceType.HIGH_LOW, numReassigned);
-                LOG.debug("end rebalancing {} - reassigned {}", BalanceType.HIGH_LOW, numReassigned);
             } else if (lowHosts.isEmpty()) {
-                LOG.debug("begin rebalancing {}", BalanceType.HIGH_AVG);
+                log.debug("begin rebalancing {}", BalanceType.HIGH_AVG);
-                numReassigned = rebalance(highHosts, avgHosts, calculatedRates, averageArrivalRate,
+                numReassigned = rebalance(highHosts, avgHosts, calculatedRates, averageArrivalRate, BalanceType.HIGH_AVG);
-                        BalanceType.HIGH_AVG);
+                log.debug("end rebalancing {} - reassigned {}", BalanceType.HIGH_AVG, numReassigned);
-                LOG.debug("end rebalancing {} - reassigned {}", BalanceType.HIGH_AVG, numReassigned);
             } else {
-                LOG.debug("begin rebalancing {}", BalanceType.AVG_LOW);
+                log.debug("begin rebalancing {}", BalanceType.AVG_LOW);
                 numReassigned = rebalance(avgHosts, lowHosts, calculatedRates, averageArrivalRate, BalanceType.AVG_LOW);
-                LOG.debug("end rebalancing {} - reassigned {}", BalanceType.AVG_LOW, numReassigned);
+                log.debug("end rebalancing {} - reassigned {}", BalanceType.AVG_LOW, numReassigned);
             }
         }
         return numReassigned;
     }
 
-    public int rebalance(Set<TimelyBalancedHost> losingHosts, Set<TimelyBalancedHost> gainingHosts,
+    public int rebalance(Set<TimelyBalancedHost> losingHosts, Set<TimelyBalancedHost> gainingHosts, Map<TimelyBalancedHost,Double> calculatedRates,
-            Map<TimelyBalancedHost, Double> calculatedRates, double targetArrivalRate, BalanceType balanceType) {
+                    double targetArrivalRate, BalanceType balanceType) {
 
         int numReassigned = 0;
         if (isLeader.get()) {
             balancerLock.writeLock().lock();
             try {
-                Map<String, ArrivalRate> tempMetricMap = new HashMap<>();
+                Map<String,ArrivalRate> tempMetricMap = new HashMap<>();
                 tempMetricMap.putAll(metricMap);
 
                 Set<TimelyBalancedHost> focusedHosts;
@@ -555,39 +581,39 @@ public class BalancedMetricResolver implements MetricResolver {
                     }
 
                     // sort metrics by rate
-                    Map<Double, String> rateSortedMetrics = new TreeMap<>(Collections.reverseOrder());
+                    Map<Double,String> rateSortedMetrics = new TreeMap<>(Collections.reverseOrder());
-                    for (Map.Entry<String, ArrivalRate> e : tempMetricMap.entrySet()) {
+                    for (Map.Entry<String,ArrivalRate> e : tempMetricMap.entrySet()) {
-                        if (metricToHostMap.get(e.getKey()).equals(h)) {
+                        TimelyBalancedHost tbh = metricToHostMap.get(e.getKey());
+                        if (tbh != null && tbh.equals(h)) {
                             rateSortedMetrics.put(e.getValue().getRate(), e.getKey());
                         }
                     }
 
-                    LOG.trace("focusHost {}:{} desiredChange:{} rateSortedMetrics.size():{}", h.getHost(),
+                    log.trace("focusHost {}:{} desiredChange:{} rateSortedMetrics.size():{}", h.getHost(), h.getTcpPort(), desiredChange,
-                            h.getTcpPort(), desiredChange, rateSortedMetrics.size());
+                                    rateSortedMetrics.size());
 
                     boolean doneWithHost = false;
                     while (!doneWithHost) {
-                        Iterator<Map.Entry<Double, String>> itr = rateSortedMetrics.entrySet().iterator();
+                        Iterator<Map.Entry<Double,String>> itr = rateSortedMetrics.entrySet().iterator();
                         while (!doneWithHost && itr.hasNext()) {
-                            Map.Entry<Double, String> e = null;
+                            Map.Entry<Double,String> e = null;
                             // find largest metric that does not exceed desired change
                             while (e == null && itr.hasNext()) {
                                 e = itr.next();
                                 if (e.getKey() > desiredChange) {
-                                    LOG.trace("Skipping:{} rate:{}", e.getValue(), e.getKey());
+                                    log.trace("Skipping:{} rate:{}", e.getValue(), e.getKey());
                                     e = null;
                                 }
                             }
 
                             if (e == null) {
-                                LOG.trace("no metric small enough");
+                                log.trace("no metric small enough");
                                 doneWithHost = true;
                             } else {
-                                LOG.trace("Selected:{} rate:{}", e.getValue(), e.getKey());
+                                log.trace("Selected:{} rate:{}", e.getValue(), e.getKey());
-                                TimelyBalancedHost candidateHost = chooseHost(selectFromHosts, calculatedRates,
+                                TimelyBalancedHost candidateHost = chooseHost(selectFromHosts, calculatedRates, calculatedRates.get(h), balanceType);
-                                        calculatedRates.get(h), balanceType);
                                 if (candidateHost == null) {
-                                    LOG.trace("candidate host is null");
+                                    log.trace("candidate host is null");
                                     doneWithHost = true;
                                 } else {
                                     String metric = e.getValue();
@@ -600,26 +626,24 @@ public class BalancedMetricResolver implements MetricResolver {
                                     // don't move this metric again this host or balance
                                     itr.remove();
                                     tempMetricMap.remove(metric);
-                                    LOG.info(
+                                    log.info("rebalancing: reassigning metric:{} rate:{} from server {}:{} to {}:{} remaining delta {}", metric, metricRate,
-                                            "rebalancing: reassigning metric:{} rate:{} from server {}:{} to {}:{} remaining delta {}",
+                                                    h.getHost(), h.getTcpPort(), candidateHost.getHost(), candidateHost.getTcpPort(), desiredChange);
-                                            metric, metricRate, h.getHost(), h.getTcpPort(), candidateHost.getHost(),
-                                            candidateHost.getTcpPort(), desiredChange);
                                 }
                             }
                         }
                         if (!itr.hasNext()) {
-                            LOG.trace("Reached end or rateSortedMetrics");
+                            log.trace("Reached end or rateSortedMetrics");
                             doneWithHost = true;
                         }
                         if (balanceType.equals(BalanceType.HIGH_LOW) || balanceType.equals(BalanceType.HIGH_AVG)) {
                             if (calculatedRates.get(h) <= targetArrivalRate) {
                                 doneWithHost = true;
-                                LOG.trace("calculatedRates.get(h) <= targetArivalRate");
+                                log.trace("calculatedRates.get(h) <= targetArivalRate");
                             }
                         } else {
                             if (calculatedRates.get(h) >= targetArrivalRate) {
                                 doneWithHost = true;
-                                LOG.trace("calculatedRates.get(h) >= targetArivalRate");
+                                log.trace("calculatedRates.get(h) >= targetArivalRate");
                             }
                         }
                     }
@@ -634,7 +658,7 @@ public class BalancedMetricResolver implements MetricResolver {
     private void addNonCachedMetrics(Collection<String> nonCachedMetricsUpdate) {
         if (!nonCachedMetricsUpdate.isEmpty()) {
             try {
-                LOG.debug("Adding {} to local nonCachedMetrics", nonCachedMetricsUpdate);
+                log.debug("Adding {} to local nonCachedMetrics", nonCachedMetricsUpdate);
                 nonCachedMetricsLocalLock.writeLock().lock();
                 try {
                     nonCachedMetrics.addAll(nonCachedMetricsUpdate);
@@ -652,14 +676,13 @@ public class BalancedMetricResolver implements MetricResolver {
                     if (currentNonCachedMetricsDistributedBytes == null) {
                         currentNonCachedMetricsIP = new TreeSet<>();
                     } else {
-                        currentNonCachedMetricsIP = SerializationUtils
+                        currentNonCachedMetricsIP = SerializationUtils.deserialize(currentNonCachedMetricsDistributedBytes);
-                                .deserialize(currentNonCachedMetricsDistributedBytes);
                     }
                     if (currentNonCachedMetricsIP.containsAll(nonCachedMetricsUpdate)) {
-                        LOG.debug("nonCachedMetricsIP already contains {}", nonCachedMetricsUpdate);
+                        log.debug("nonCachedMetricsIP already contains {}", nonCachedMetricsUpdate);
                     } else {
                         nonCachedMetricsUpdate.removeAll(currentNonCachedMetricsIP);
-                        LOG.debug("Adding {} to nonCachedMetricsIP", nonCachedMetricsUpdate);
+                        log.debug("Adding {} to nonCachedMetricsIP", nonCachedMetricsUpdate);
                         TreeSet<String> updateSet = new TreeSet<>();
                         updateSet.addAll(currentNonCachedMetricsIP);
                         updateSet.addAll(nonCachedMetricsUpdate);
@@ -673,7 +696,7 @@ public class BalancedMetricResolver implements MetricResolver {
                     nonCachedMetricsIPRWLock.writeLock().release();
                 }
             } catch (Exception e) {
-                LOG.error(e.getMessage(), e);
+                log.error(e.getMessage(), e);
             }
         }
     }
@@ -684,16 +707,15 @@ public class BalancedMetricResolver implements MetricResolver {
         } catch (Exception e1) {
             try {
                 curatorFramework.delete().deletingChildrenIfNeeded().forPath(path);
-                curatorFramework.create().creatingParentContainersIfNeeded().withMode(CreateMode.PERSISTENT)
+                curatorFramework.create().creatingParentContainersIfNeeded().withMode(CreateMode.PERSISTENT).forPath(path);
-                        .forPath(path);
             } catch (Exception e2) {
-                LOG.info(e2.getMessage(), e2);
+                log.info(e2.getMessage(), e2);
             }
         } finally {
             try {
                 lock.writeLock().release();
             } catch (Exception e3) {
-                LOG.error(e3.getMessage(), e3);
+                log.error(e3.getMessage(), e3);
             }
         }
     }
@@ -724,7 +746,7 @@ public class BalancedMetricResolver implements MetricResolver {
             try {
                 for (String r : nonCachedMetrics) {
                     if (metricName.matches(r)) {
-                        LOG.debug("Adding {} to list of non-cached metrics", metricName);
+                        log.debug("Adding {} to list of non-cached metrics", metricName);
                         addNonCachedMetrics(Collections.singleton(metricName));
                         return false;
                     }
@@ -736,7 +758,6 @@ public class BalancedMetricResolver implements MetricResolver {
         }
     }
 
-    @Override
     public TimelyBalancedHost getHostPortKeyIngest(String metric) {
 
         TimelyBalancedHost tbh = null;
@@ -744,18 +765,26 @@ public class BalancedMetricResolver implements MetricResolver {
         boolean chooseMetricSpecificHost;
         try {
             chooseMetricSpecificHost = shouldCache(metric) ? true : false;
+            ArrivalRate rate = metricMap.get(metric);
+            if ((chooseMetricSpecificHost && rate == null) || (!chooseMetricSpecificHost && rate != null)) {
+                if (!balancerLock.isWriteLockedByCurrentThread()) {
+                    balancerLock.readLock().unlock();
+                    balancerLock.writeLock().lock();
+                }
+            }
+
             if (chooseMetricSpecificHost) {
-                ArrivalRate rate = metricMap.get(metric);
                 if (rate == null) {
-                    rate = new ArrivalRate(arrivalRateTimer);
+                    rate = new ArrivalRate(arrivalRateExecutor);
-                    if (!balancerLock.isWriteLockedByCurrentThread()) {
+                    // already write locked above
-                        balancerLock.readLock().unlock();
-                        balancerLock.writeLock().lock();
-                    }
                     metricMap.put(metric, rate);
                 }
                 rate.arrived();
             } else {
+                if (rate != null) {
+                    // already write locked above
+                    metricMap.remove(metric);
+                }
                 metric = null;
             }
 
@@ -765,20 +794,19 @@ public class BalancedMetricResolver implements MetricResolver {
                 tbh = metricToHostMap.get(metric);
                 if (tbh == null) {
                     tbh = getRoundRobinHost(null);
-                    if (!balancerLock.isWriteLockedByCurrentThread()) {
-                        balancerLock.readLock().unlock();
-                        balancerLock.writeLock().lock();
-                    }
-                    assignMetric(metric, tbh);
                 } else if (!tbh.isUp()) {
                     TimelyBalancedHost oldTbh = tbh;
                     tbh = getLeastUsedHost();
-                    LOG.debug("rebalancing from host that is down: reassigning metric {} from server {}:{} to {}:{}",
+                    if (tbh != null) {
-                            metric, oldTbh.getHost(), oldTbh.getTcpPort(), tbh.getHost(), tbh.getTcpPort());
+                        log.debug("rebalancing from host that is down: reassigning metric {} from server {}:{} to {}:{}", metric, oldTbh.getHost(),
-                    if (!balancerLock.isWriteLockedByCurrentThread()) {
+                                        oldTbh.getTcpPort(), tbh.getHost(), tbh.getTcpPort());
-                        balancerLock.readLock().unlock();
-                        balancerLock.writeLock().lock();
                     }
+                }
+                if (!balancerLock.isWriteLockedByCurrentThread()) {
+                    balancerLock.readLock().unlock();
+                    balancerLock.writeLock().lock();
+                }
+                if (tbh != null) {
                     assignMetric(metric, tbh);
                 }
             }
@@ -812,7 +840,6 @@ public class BalancedMetricResolver implements MetricResolver {
         return tbh;
     }
 
-    @Override
     public TimelyBalancedHost getHostPortKey(String metric) {
         TimelyBalancedHost tbh = null;
 
@@ -878,6 +905,41 @@ public class BalancedMetricResolver implements MetricResolver {
         return tbh;
     }
 
+    protected FileSystem getFileSystem(Path path) throws IOException {
+        Configuration configuration = new Configuration();
+        if (StringUtils.isNotBlank(balancerProperties.getDefaultFs())) {
+            configuration.set(FS_DEFAULT_NAME_KEY, balancerProperties.getDefaultFs());
+        }
+        if (balancerProperties.getFsConfigResources() != null) {
+            for (String resource : balancerProperties.getFsConfigResources()) {
+                configuration.addResource(new Path(resource));
+            }
+        }
+        return FileSystem.get(path.toUri(), configuration);
+    }
+
+    protected void createAssignmentFile() {
+        try {
+            log.info("Creating assignment file: " + this.assignmentFile);
+            this.fs.create(this.assignmentFile);
+        } catch (Exception e) {
+            log.error(e.getMessage(), e);
+        }
+    }
+
+    protected long getLastWrittenToHdfsTimestamp() {
+        try {
+            FileStatus fileStatus = this.fs.getFileStatus(this.assignmentFile);
+            return fileStatus.getModificationTime();
+        } catch (FileNotFoundException e) {
+            createAssignmentFile();
+            return System.currentTimeMillis();
+        } catch (Exception e) {
+            log.error(e.getMessage(), e);
+            return System.currentTimeMillis();
+        }
+    }
+
     private void readAssignmentsFromHdfs(boolean checkIfNecessary) {
 
         try {
@@ -885,32 +947,28 @@ public class BalancedMetricResolver implements MetricResolver {
             long lastHdfsUpdate = assignmentsLastUpdatedInHdfs.get().postValue();
             if (checkIfNecessary) {
                 if (lastHdfsUpdate <= lastLocalUpdate) {
-                    LOG.debug("Not reading assignments from hdfs lastHdfsUpdate ({}) <= lastLocalUpdate ({})",
+                    log.debug("Not reading assignments from hdfs lastHdfsUpdate ({}) <= lastLocalUpdate ({})", new Date(lastHdfsUpdate),
-                            new Date(lastHdfsUpdate), new Date(lastLocalUpdate));
+                                    new Date(lastLocalUpdate));
                     return;
                 }
             }
-            LOG.debug("Reading assignments from hdfs lastHdfsUpdate ({}) > lastLocalUpdate ({})",
+            log.debug("Reading assignments from hdfs lastHdfsUpdate ({}) > lastLocalUpdate ({})", new Date(lastHdfsUpdate), new Date(lastLocalUpdate));
-                    new Date(lastHdfsUpdate), new Date(lastLocalUpdate));
         } catch (Exception e) {
-            LOG.error(e.getMessage(), e);
+            log.error(e.getMessage(), e);
         }
 
         // proceed with reading from HDFS
 
-        Map<String, TimelyBalancedHost> assignedMetricToHostMap = new TreeMap<>();
+        Map<String,TimelyBalancedHost> assignedMetricToHostMap = new TreeMap<>();
+        CsvReader reader = null;
         try {
             boolean acquired = false;
             while (!acquired) {
                 acquired = assignmentsIPRWLock.readLock().acquire(60, TimeUnit.SECONDS);
             }
             balancerLock.writeLock().lock();
-            Configuration configuration = new Configuration();
+            FSDataInputStream iStream = this.fs.open(this.assignmentFile);
-            FileSystem fs = FileSystem.get(configuration);
+            reader = new CsvReader(iStream, ',', Charset.forName("UTF-8"));
-            Path assignmentFile = new Path(balancerConfig.getAssignmentFile());
-            FSDataInputStream iStream = fs.open(assignmentFile);
-
-            CsvReader reader = new CsvReader(iStream, ',', Charset.forName("UTF-8"));
             reader.setUseTextQualifier(false);
 
             // skip the headers
@@ -928,30 +986,31 @@ public class BalancedMetricResolver implements MetricResolver {
                     if (tbh == null) {
                         tbh = getRoundRobinHost(null);
                     } else {
-                        LOG.trace("Found assigment: {} to {}:{}", metric, host, tcpPort);
+                        log.trace("Found assigment: {} to {}:{}", metric, host, tcpPort);
+                    }
+                    if (tbh != null) {
+                        assignedMetricToHostMap.put(metric, tbh);
                     }
-                    assignedMetricToHostMap.put(metric, tbh);
                 }
             }
 
             metricToHostMap.clear();
-            for (Map.Entry<String, TimelyBalancedHost> e : assignedMetricToHostMap.entrySet()) {
+            for (Map.Entry<String,TimelyBalancedHost> e : assignedMetricToHostMap.entrySet()) {
                 if (StringUtils.isNotBlank(e.getKey()) && e.getValue() != null) {
                     if (shouldCache(e.getKey())) {
                         metricToHostMap.put(e.getKey(), e.getValue());
                     }
                 } else {
-                    Exception e1 = new IllegalStateException(
+                    Exception e1 = new IllegalStateException("Bad assignment metric:" + e.getKey() + " host:" + e.getValue());
-                            "Bad assignment metric:" + e.getKey() + " host:" + e.getValue());
+                    log.warn(e1.getMessage(), e1);
-                    LOG.warn(e1.getMessage(), e1);
                 }
             }
 
             nonCachedMetricsLocalLock.readLock().lock();
             try {
-                Iterator<Map.Entry<String, TimelyBalancedHost>> itr = metricToHostMap.entrySet().iterator();
+                Iterator<Map.Entry<String,TimelyBalancedHost>> itr = metricToHostMap.entrySet().iterator();
                 while (itr.hasNext()) {
-                    Map.Entry<String, TimelyBalancedHost> e = itr.next();
+                    Map.Entry<String,TimelyBalancedHost> e = itr.next();
                     if (nonCachedMetrics.contains(e.getKey())) {
                         itr.remove();
                     }
@@ -959,17 +1018,26 @@ public class BalancedMetricResolver implements MetricResolver {
             } finally {
                 nonCachedMetricsLocalLock.readLock().unlock();
             }
+            // remove metric from metricMap (ArrivalRate) if not being cached
+            metricMap.entrySet().removeIf(e -> !metricToHostMap.containsKey(e.getKey()));
+
             assignmentsLastUpdatedLocal.set(assignmentsLastUpdatedInHdfs.get().postValue());
-            LOG.info("Read {} assignments from hdfs lastHdfsUpdate = lastLocalUpdate ({})", metricToHostMap.size(),
+            log.info("Read {} assignments from hdfs lastHdfsUpdate = lastLocalUpdate ({})", metricToHostMap.size(),
-                    new Date(assignmentsLastUpdatedLocal.get()));
+                            new Date(assignmentsLastUpdatedLocal.get()));
+        } catch (FileNotFoundException e) {
+            createAssignmentFile();
+            metricToHostMap.clear();
         } catch (Exception e) {
-            LOG.error(e.getMessage(), e);
+            log.error(e.getMessage(), e);
         } finally {
+            if (reader != null) {
+                reader.close();
+            }
             balancerLock.writeLock().unlock();
             try {
                 assignmentsIPRWLock.readLock().release();
             } catch (Exception e) {
-                LOG.error(e.getMessage(), e);
+                log.error(e.getMessage(), e);
             }
         }
     }
@@ -986,27 +1054,23 @@ public class BalancedMetricResolver implements MetricResolver {
             nonCachedMetricsLocalLock.readLock().lock();
             try {
                 if (!metricToHostMap.isEmpty()) {
-                    Configuration configuration = new Configuration();
+                    if (!this.fs.exists(this.assignmentFile.getParent())) {
-                    FileSystem fs = FileSystem.get(configuration);
+                        this.fs.mkdirs(this.assignmentFile.getParent());
-                    Path assignmentFile = new Path(balancerConfig.getAssignmentFile());
-                    if (!fs.exists(assignmentFile.getParent())) {
-                        fs.mkdirs(assignmentFile.getParent());
                     }
-                    FSDataOutputStream oStream = fs.create(assignmentFile, true);
+                    FSDataOutputStream oStream = this.fs.create(this.assignmentFile, true);
                     writer = new CsvWriter(oStream, ',', Charset.forName("UTF-8"));
                     writer.setUseTextQualifier(false);
                     writer.write("metric");
                     writer.write("host");
                     writer.write("tcpPort");
                     writer.endRecord();
-                    for (Map.Entry<String, TimelyBalancedHost> e : metricToHostMap.entrySet()) {
+                    for (Map.Entry<String,TimelyBalancedHost> e : metricToHostMap.entrySet()) {
-                        if (!nonCachedMetrics.contains(e.getKey())) {
+                        if (e.getValue() != null && !nonCachedMetrics.contains(e.getKey())) {
                             writer.write(e.getKey());
                             writer.write(e.getValue().getHost());
                             writer.write(Integer.toString(e.getValue().getTcpPort()));
                             writer.endRecord();
-                            LOG.trace("Saving assigment: {} to {}:{}", e.getKey(), e.getValue().getHost(),
+                            log.trace("Saving assigment: {} to {}:{}", e.getKey(), e.getValue().getHost(), e.getValue().getTcpPort());
-                                    e.getValue().getTcpPort());
                         }
                     }
 
@@ -1016,15 +1080,17 @@ public class BalancedMetricResolver implements MetricResolver {
                     if (!assignmentsLastUpdatedInHdfs.get().succeeded()) {
                         assignmentsLastUpdatedInHdfs.forceSet(now);
                     }
-                    LOG.debug("Wrote {} assignments to hdfs lastHdfsUpdate = lastLocalUpdate ({})",
+                    log.info("Wrote {} assignments to hdfs lastHdfsUpdate = lastLocalUpdate ({})", metricToHostMap.size(),
-                            metricToHostMap.size(), new Date(assignmentsLastUpdatedLocal.get()));
+                                    new Date(assignmentsLastUpdatedLocal.get()));
+                    // remove metric from metricMap (ArrivalRate) if not being cached
+                    metricMap.entrySet().removeIf(e -> !metricToHostMap.containsKey(e.getKey()));
                 }
             } finally {
                 nonCachedMetricsLocalLock.readLock().unlock();
                 balancerLock.readLock().unlock();
             }
         } catch (Exception e) {
-            LOG.error(e.getMessage(), e);
+            log.error(e.getMessage(), e);
         } finally {
             if (writer != null) {
                 writer.close();
@@ -1032,12 +1098,12 @@ public class BalancedMetricResolver implements MetricResolver {
             try {
                 assignmentsIPRWLock.writeLock().release();
             } catch (Exception e) {
-                LOG.error(e.getMessage(), e);
+                log.error(e.getMessage(), e);
             }
         }
     }
 
-    private void assignMetric(String metric, TimelyBalancedHost tbh) {
+    protected void assignMetric(String metric, TimelyBalancedHost tbh) {
         if (isLeader.get()) {
             if (StringUtils.isNotBlank(metric) && tbh != null) {
                 balancerLock.writeLock().lock();
@@ -1049,7 +1115,21 @@ public class BalancedMetricResolver implements MetricResolver {
                 }
             } else {
                 Exception e = new IllegalStateException("Bad assignment metric:" + metric + " host:" + tbh);
-                LOG.warn(e.getMessage(), e);
+                log.warn(e.getMessage(), e);
+            }
+        }
+    }
+
+    protected void unassignMetric(String metric) {
+        if (isLeader.get()) {
+            if (StringUtils.isNotBlank(metric)) {
+                balancerLock.writeLock().lock();
+                try {
+                    metricToHostMap.remove(metric);
+                    assignmentsLastUpdatedLocal.set(System.currentTimeMillis());
+                } finally {
+                    balancerLock.writeLock().unlock();
+                }
             }
         }
     }

balancer/src/main/java/timely/balancer/TimelyBalancer.java

@@ -0,0 +1,14 @@
+package timely.balancer;
+
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+
+@SpringBootApplication(scanBasePackages = {"timely.balancer", "timely.common"}, exclude = {ErrorMvcAutoConfiguration.class})
+public class TimelyBalancer {
+
+    public static void main(String[] args) {
+        new SpringApplicationBuilder(TimelyBalancer.class).web(WebApplicationType.NONE).run(args);
+    }
+}

balancer/src/main/java/timely/balancer/configuration/BalancerConfiguration.java

@@ -1,123 +1,58 @@
 package timely.balancer.configuration;
 
-import javax.validation.Valid;
+import javax.net.ssl.SSLContext;
 
-import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.apache.curator.framework.CuratorFramework;
-import org.springframework.boot.context.properties.NestedConfigurationProperty;
+import org.springframework.beans.factory.annotation.Qualifier;
-import org.springframework.stereotype.Component;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
-import org.springframework.validation.annotation.Validated;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
-import timely.configuration.Cache;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
 
-@Validated
+import io.netty.handler.ssl.SslContext;
-@Component
+import timely.balancer.Balancer;
-@ConfigurationProperties(prefix = "timely-balancer")
+import timely.balancer.HealthChecker;
+import timely.balancer.MetricResolver;
+import timely.common.component.AuthenticationService;
+import timely.common.configuration.CacheProperties;
+import timely.common.configuration.SecurityProperties;
+import timely.common.configuration.SslClientProperties;
+import timely.common.configuration.SslServerProperties;
+import timely.common.configuration.ZookeeperProperties;
+
+@Configuration
+@EnableConfigurationProperties({BalancerProperties.class, BalancerServerProperties.class, BalancerWebsocketProperties.class, BalancerHttpProperties.class})
 public class BalancerConfiguration {
 
-    @Valid
+    @Bean
-    @NestedConfigurationProperty
+    @ConditionalOnMissingBean
-    private BalancerServer server = new BalancerServer();
+    public Balancer balancer(ApplicationContext applicationContext, @Qualifier("nettySslContext") SslContext serverSslContext,
-
+                    @Qualifier("outboundJDKSslContext") SSLContext clientSSLContext, AuthenticationService authenticationService, MetricResolver metricResolver,
-    @Valid
+                    BalancerProperties balancerProperties, ZookeeperProperties zookeeperProperties, SecurityProperties securityProperties,
-    @NestedConfigurationProperty
+                    SslServerProperties sslServerProperties, SslClientProperties sslClientProperties, BalancerServerProperties balancerServerProperties,
-    private BalancerHttp http = new BalancerHttp();
+                    BalancerHttpProperties balancerHttpProperties, BalancerWebsocketProperties balancerWebsocketProperties) {
-
+        Balancer balancer = new Balancer(applicationContext, serverSslContext, clientSSLContext, authenticationService, metricResolver, balancerProperties,
-    @Valid
+                        zookeeperProperties, securityProperties, sslServerProperties, sslClientProperties, balancerServerProperties, balancerHttpProperties,
-    @NestedConfigurationProperty
+                        balancerWebsocketProperties);
-    private BalancerWebsocket websocket = new BalancerWebsocket();
+        balancer.start();
-
+        return balancer;
-    @Valid
-    @NestedConfigurationProperty
-    private ZooKeeper zooKeeper = new ZooKeeper();
-
-    @Valid
-    @NestedConfigurationProperty
-    private BalancerSecurity security = new BalancerSecurity();
-
-    @Valid
-    @NestedConfigurationProperty
-    private Cache cache = new Cache();
-
-    private boolean loginRequired = false;
-
-    private String assignmentFile;
-
-    private Double controlBandPercentage = 0.05;
-
-    private long checkServerHealthInterval = 10000;
-
-    private int serverFailuresBeforeDown = 3;
-
-    private int serverSuccessesBeforeUp = 3;
-
-    public ZooKeeper getZooKeeper() {
-        return zooKeeper;
     }
 
-    public void setLoginRequired(boolean loginRequired) {
+    @Bean
-        this.loginRequired = loginRequired;
+    @ConditionalOnMissingBean
+    public HealthChecker healthChecker(BalancerProperties balancerProperties, BalancerServerProperties balancerServerProperties) {
+        HealthChecker healthChecker = new HealthChecker(balancerProperties, balancerServerProperties);
+        healthChecker.start();
+        return healthChecker;
     }
 
-    public boolean isLoginRequired() {
+    @Bean
-        return loginRequired;
+    @ConditionalOnMissingBean
-    }
+    public MetricResolver metricResolver(CuratorFramework curatorFramework, BalancerProperties balancerProperties, CacheProperties cacheProperties,
-
+                    HealthChecker healthChecker) throws Exception {
-    public String getAssignmentFile() {
+        MetricResolver metricResolver = new MetricResolver(curatorFramework, balancerProperties, cacheProperties, healthChecker);
-        return assignmentFile;
+        metricResolver.start();
-    }
+        return metricResolver;
-
-    public void setAssignmentFile(String assignmentFile) {
-        this.assignmentFile = assignmentFile;
-    }
-
-    public void setControlBandPercentage(Double controlBandPercentage) {
-        this.controlBandPercentage = controlBandPercentage;
-    }
-
-    public Double getControlBandPercentage() {
-        return controlBandPercentage;
-    }
-
-    public BalancerSecurity getSecurity() {
-        return security;
-    }
-
-    public BalancerServer getServer() {
-        return server;
-    }
-
-    public BalancerHttp getHttp() {
-        return http;
-    }
-
-    public BalancerWebsocket getWebsocket() {
-        return websocket;
-    }
-
-    public Cache getCache() {
-        return cache;
-    }
-
-    public void setCheckServerHealthInterval(long checkServerHealthInterval) {
-        this.checkServerHealthInterval = checkServerHealthInterval;
-    }
-
-    public long getCheckServerHealthInterval() {
-        return checkServerHealthInterval;
-    }
-
-    public int getServerFailuresBeforeDown() {
-        return serverFailuresBeforeDown;
-    }
-
-    public void setServerFailuresBeforeDown(int serverFailuresBeforeDown) {
-        this.serverFailuresBeforeDown = serverFailuresBeforeDown;
-    }
-
-    public int getServerSuccessesBeforeUp() {
-        return serverSuccessesBeforeUp;
-    }
-
-    public void setServerSuccessesBeforeUp(int serverSuccessesBeforeUp) {
-        this.serverSuccessesBeforeUp = serverSuccessesBeforeUp;
     }
 }

balancer/src/main/java/timely/balancer/configuration/BalancerHttp.java

@@ -1,19 +0,0 @@
-package timely.balancer.configuration;
-
-import javax.validation.Valid;
-
-import org.apache.commons.pool2.impl.GenericKeyedObjectPoolConfig;
-import org.apache.http.impl.client.CloseableHttpClient;
-import org.springframework.boot.context.properties.NestedConfigurationProperty;
-import timely.configuration.Http;
-
-public class BalancerHttp extends Http {
-
-    @Valid
-    @NestedConfigurationProperty
-    private GenericKeyedObjectPoolConfig<CloseableHttpClient> httpClientPool = new GenericKeyedObjectPoolConfig<>();
-
-    public GenericKeyedObjectPoolConfig<CloseableHttpClient> getHttpClientPool() {
-        return httpClientPool;
-    }
-}

balancer/src/main/java/timely/balancer/configuration/BalancerHttpProperties.java

@@ -0,0 +1,60 @@
+package timely.balancer.configuration;
+
+import javax.validation.Valid;
+
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.NestedConfigurationProperty;
+import org.springframework.cloud.context.config.annotation.RefreshScope;
+
+import timely.common.configuration.HttpProperties;
+
+@RefreshScope
+@ConfigurationProperties(prefix = "timely.balancer.http")
+public class BalancerHttpProperties extends HttpProperties {
+
+    private int connectionRequestTimeout = 5000;
+    private int connectTimeout = 5000;
+    private int socketTimeout = 300000;
+    private int requestTimeout = 300000;
+
+    @Valid
+    @NestedConfigurationProperty
+    private GenericKeyedObjectPoolConfiguration<CloseableHttpClient> httpClientPool = new GenericKeyedObjectPoolConfiguration<>();
+
+    public GenericKeyedObjectPoolConfiguration<CloseableHttpClient> getHttpClientPool() {
+        return httpClientPool;
+    }
+
+    public void setConnectionRequestTimeout(final int connectionRequestTimeout) {
+        this.connectionRequestTimeout = connectionRequestTimeout;
+    }
+
+    public int getConnectionRequestTimeout() {
+        return connectionRequestTimeout;
+    }
+
+    public void setConnectTimeout(final int connectTimeout) {
+        this.connectTimeout = connectTimeout;
+    }
+
+    public int getConnectTimeout() {
+        return connectTimeout;
+    }
+
+    public void setSocketTimeout(final int socketTimeout) {
+        this.socketTimeout = socketTimeout;
+    }
+
+    public int getSocketTimeout() {
+        return socketTimeout;
+    }
+
+    public void setRequestTimeout(int requestTimeout) {
+        this.requestTimeout = requestTimeout;
+    }
+
+    public int getRequestTimeout() {
+        return requestTimeout;
+    }
+}

balancer/src/main/java/timely/balancer/configuration/BalancerProperties.java

@@ -0,0 +1,93 @@
+package timely.balancer.configuration;
+
+import java.util.List;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+import org.springframework.validation.annotation.Validated;
+
+@Validated
+@Component
+@ConfigurationProperties(prefix = "timely.balancer")
+public class BalancerProperties {
+
+    private boolean loginRequired = false;
+
+    private String assignmentFile;
+
+    private String defaultFs;
+
+    private List<String> fsConfigResources;
+
+    private Double controlBandPercentage = 0.05;
+
+    private long checkServerHealthInterval = 10000;
+
+    private int serverFailuresBeforeDown = 3;
+
+    private int serverSuccessesBeforeUp = 3;
+
+    public void setLoginRequired(boolean loginRequired) {
+        this.loginRequired = loginRequired;
+    }
+
+    public boolean isLoginRequired() {
+        return loginRequired;
+    }
+
+    public String getAssignmentFile() {
+        return assignmentFile;
+    }
+
+    public void setAssignmentFile(String assignmentFile) {
+        this.assignmentFile = assignmentFile;
+    }
+
+    public String getDefaultFs() {
+        return defaultFs;
+    }
+
+    public void setDefaultFs(String defaultFs) {
+        this.defaultFs = defaultFs;
+    }
+
+    public List<String> getFsConfigResources() {
+        return fsConfigResources;
+    }
+
+    public void setFsConfigResources(List<String> fsConfigResources) {
+        this.fsConfigResources = fsConfigResources;
+    }
+
+    public void setControlBandPercentage(Double controlBandPercentage) {
+        this.controlBandPercentage = controlBandPercentage;
+    }
+
+    public Double getControlBandPercentage() {
+        return controlBandPercentage;
+    }
+
+    public void setCheckServerHealthInterval(long checkServerHealthInterval) {
+        this.checkServerHealthInterval = checkServerHealthInterval;
+    }
+
+    public long getCheckServerHealthInterval() {
+        return checkServerHealthInterval;
+    }
+
+    public int getServerFailuresBeforeDown() {
+        return serverFailuresBeforeDown;
+    }
+
+    public void setServerFailuresBeforeDown(int serverFailuresBeforeDown) {
+        this.serverFailuresBeforeDown = serverFailuresBeforeDown;
+    }
+
+    public int getServerSuccessesBeforeUp() {
+        return serverSuccessesBeforeUp;
+    }
+
+    public void setServerSuccessesBeforeUp(int serverSuccessesBeforeUp) {
+        this.serverSuccessesBeforeUp = serverSuccessesBeforeUp;
+    }
+}

balancer/src/main/java/timely/balancer/configuration/BalancerSecurity.java

@@ -1,17 +0,0 @@
-package timely.balancer.configuration;
-
-import javax.validation.Valid;
-
-import org.springframework.boot.context.properties.NestedConfigurationProperty;
-import timely.configuration.Security;
-
-public class BalancerSecurity extends Security {
-
-    @Valid
-    @NestedConfigurationProperty
-    private ClientSsl clientSsl = new ClientSsl();
-
-    public ClientSsl getClientSsl() {
-        return clientSsl;
-    }
-}

balancer/src/main/java/timely/balancer/configuration/BalancerServer.java

@@ -1,48 +0,0 @@
-package timely.balancer.configuration;
-
-import javax.validation.Valid;
-
-import org.apache.commons.pool2.impl.GenericKeyedObjectPoolConfig;
-import org.springframework.boot.context.properties.NestedConfigurationProperty;
-import timely.client.tcp.TcpClient;
-import timely.client.udp.UdpClient;
-import timely.configuration.Server;
-
-public class BalancerServer extends Server {
-
-    @Valid
-    @NestedConfigurationProperty
-    private GenericKeyedObjectPoolConfig<UdpClient> udpClientPool = new GenericKeyedObjectPoolConfig<>();
-
-    @Valid
-    @NestedConfigurationProperty
-    private GenericKeyedObjectPoolConfig<TcpClient> tcpClientPool = new GenericKeyedObjectPoolConfig<>();
-
-    private int numTcpPools = 1;
-
-    private int tcpBufferSize = -1;
-
-    public GenericKeyedObjectPoolConfig<UdpClient> getUdpClientPool() {
-        return udpClientPool;
-    }
-
-    public GenericKeyedObjectPoolConfig<TcpClient> getTcpClientPool() {
-        return tcpClientPool;
-    }
-
-    public int getNumTcpPools() {
-        return numTcpPools;
-    }
-
-    public void setNumTcpPools(int numTcpPools) {
-        this.numTcpPools = numTcpPools;
-    }
-
-    public int getTcpBufferSize() {
-        return tcpBufferSize;
-    }
-
-    public void setTcpBufferSize(int tcpBufferSize) {
-        this.tcpBufferSize = tcpBufferSize;
-    }
-}

balancer/src/main/java/timely/balancer/configuration/BalancerServerProperties.java

@@ -0,0 +1,42 @@
+package timely.balancer.configuration;
+
+import javax.validation.Valid;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.NestedConfigurationProperty;
+import org.springframework.cloud.context.config.annotation.RefreshScope;
+
+import timely.client.tcp.TcpClient;
+import timely.client.udp.UdpClient;
+import timely.common.configuration.ServerProperties;
+
+@RefreshScope
+@ConfigurationProperties(prefix = "timely.balancer.server")
+public class BalancerServerProperties extends ServerProperties {
+
+    @Valid
+    @NestedConfigurationProperty
+    private GenericKeyedObjectPoolConfiguration<UdpClient> udpClientPool = new GenericKeyedObjectPoolConfiguration<>();
+
+    @Valid
+    @NestedConfigurationProperty
+    private GenericKeyedObjectPoolConfiguration<TcpClient> tcpClientPool = new GenericKeyedObjectPoolConfiguration<>();
+
+    private int tcpBufferSize = -1;
+
+    public GenericKeyedObjectPoolConfiguration<UdpClient> getUdpClientPool() {
+        return udpClientPool;
+    }
+
+    public GenericKeyedObjectPoolConfiguration<TcpClient> getTcpClientPool() {
+        return tcpClientPool;
+    }
+
+    public int getTcpBufferSize() {
+        return tcpBufferSize;
+    }
+
+    public void setTcpBufferSize(int tcpBufferSize) {
+        this.tcpBufferSize = tcpBufferSize;
+    }
+}

balancer/src/main/java/timely/balancer/configuration/BalancerWebsocket.java

@@ -1,29 +0,0 @@
-package timely.balancer.configuration;
-
-import javax.validation.Valid;
-
-import org.apache.commons.pool2.impl.GenericKeyedObjectPoolConfig;
-import org.springframework.boot.context.properties.NestedConfigurationProperty;
-import timely.client.websocket.subscription.WebSocketSubscriptionClient;
-import timely.configuration.Websocket;
-
-public class BalancerWebsocket extends Websocket {
-
-    @Valid
-    @NestedConfigurationProperty
-    private GenericKeyedObjectPoolConfig<WebSocketSubscriptionClient> wsClientPool = new GenericKeyedObjectPoolConfig<>();
-
-    public GenericKeyedObjectPoolConfig<WebSocketSubscriptionClient> getWsClientPool() {
-        return wsClientPool;
-    }
-
-    public int incomingBufferSize = 50000000;
-
-    public int getIncomingBufferSize() {
-        return incomingBufferSize;
-    }
-
-    public void setIncomingBufferSize(int incomingBufferSize) {
-        this.incomingBufferSize = incomingBufferSize;
-    }
-}

balancer/src/main/java/timely/balancer/configuration/BalancerWebsocketProperties.java

@@ -0,0 +1,33 @@
+package timely.balancer.configuration;
+
+import javax.validation.Valid;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.NestedConfigurationProperty;
+import org.springframework.cloud.context.config.annotation.RefreshScope;
+
+import timely.client.websocket.subscription.WebSocketSubscriptionClient;
+import timely.common.configuration.WebsocketProperties;
+
+@RefreshScope
+@ConfigurationProperties(prefix = "timely.balancer.websocket")
+public class BalancerWebsocketProperties extends WebsocketProperties {
+
+    @Valid
+    @NestedConfigurationProperty
+    private GenericKeyedObjectPoolConfiguration<WebSocketSubscriptionClient> wsClientPool = new GenericKeyedObjectPoolConfiguration<>();
+
+    public GenericKeyedObjectPoolConfiguration<WebSocketSubscriptionClient> getWsClientPool() {
+        return wsClientPool;
+    }
+
+    private int incomingBufferSize = 50000000;
+
+    public int getIncomingBufferSize() {
+        return incomingBufferSize;
+    }
+
+    public void setIncomingBufferSize(int incomingBufferSize) {
+        this.incomingBufferSize = incomingBufferSize;
+    }
+}

balancer/src/main/java/timely/balancer/configuration/ClientSsl.java

@@ -1,77 +0,0 @@
-package timely.balancer.configuration;
-
-public class ClientSsl {
-
-    private String keyFile;
-    private String keyType;
-    private String keyPassword;
-    private String trustStoreFile;
-    private String trustStoreType;
-    private String trustStorePassword;
-    private boolean useClientCert = true;
-    private boolean hostVerificationEnabled = true;
-
-    public String getKeyFile() {
-        return keyFile;
-    }
-
-    public void setKeyFile(String keyFile) {
-        this.keyFile = keyFile;
-    }
-
-    public String getKeyType() {
-        return keyType;
-    }
-
-    public void setKeyType(String keyType) {
-        this.keyType = keyType;
-    }
-
-    public String getKeyPassword() {
-        return keyPassword;
-    }
-
-    public void setKeyPassword(String keyPassword) {
-        this.keyPassword = keyPassword;
-    }
-
-    public String getTrustStoreFile() {
-        return trustStoreFile;
-    }
-
-    public void setTrustStoreFile(String trustStoreFile) {
-        this.trustStoreFile = trustStoreFile;
-    }
-
-    public String getTrustStoreType() {
-        return trustStoreType;
-    }
-
-    public void setTrustStoreType(String trustStoreType) {
-        this.trustStoreType = trustStoreType;
-    }
-
-    public String getTrustStorePassword() {
-        return trustStorePassword;
-    }
-
-    public void setTrustStorePassword(String trustStorePassword) {
-        this.trustStorePassword = trustStorePassword;
-    }
-
-    public void setUseClientCert(boolean useClientCert) {
-        this.useClientCert = useClientCert;
-    }
-
-    public boolean isUseClientCert() {
-        return useClientCert;
-    }
-
-    public void setHostVerificationEnabled(boolean hostVerificationEnabled) {
-        this.hostVerificationEnabled = hostVerificationEnabled;
-    }
-
-    public boolean isHostVerificationEnabled() {
-        return hostVerificationEnabled;
-    }
-}

balancer/src/main/java/timely/balancer/configuration/GenericKeyedObjectPoolConfiguration.java

@@ -0,0 +1,83 @@
+package timely.balancer.configuration;
+
+import java.io.PrintWriter;
+import java.nio.charset.StandardCharsets;
+import java.time.Duration;
+
+import org.apache.commons.pool2.impl.AbandonedConfig;
+import org.apache.commons.pool2.impl.GenericKeyedObjectPoolConfig;
+
+public class GenericKeyedObjectPoolConfiguration<T> extends GenericKeyedObjectPoolConfig<T> {
+
+    private Duration removeAbandonedTimeout = null;
+    private boolean removeAbandonedLogging = false;
+    private boolean removeAbandonedOnBorrow = false;
+    private boolean removeAbandonedOnMaintenance = false;
+
+    public void setMaxWaitMillis(long maxWaitMillis) {
+        super.setMaxWait(Duration.ofMillis(maxWaitMillis));
+    }
+
+    public void setMinEvictableIdleTimeMillis(long minEvictableIdleTimeMillis) {
+        super.setMinEvictableIdleTime(Duration.ofMillis(minEvictableIdleTimeMillis));
+    }
+
+    public void setEvictorShutdownTimeoutMillis(long evictorShutdownTimeoutMillis) {
+        super.setEvictorShutdownTimeout(Duration.ofMillis(evictorShutdownTimeoutMillis));
+    }
+
+    public void setSoftMinEvictableIdleTimeMillis(long softMinEvictableIdleTimeMillis) {
+        super.setSoftMinEvictableIdleTime(Duration.ofMillis(softMinEvictableIdleTimeMillis));
+    }
+
+    public void setTimeBetweenEvictionRunsMillis(long timeBetweenEvictionRunsMillis) {
+        super.setTimeBetweenEvictionRuns(Duration.ofMillis(timeBetweenEvictionRunsMillis));
+    }
+
+    public void setRemoveAbandonedTimeoutMillis(long removeAbandonedTimeoutMillis) {
+        this.removeAbandonedTimeout = Duration.ofMillis(removeAbandonedTimeoutMillis);
+    }
+
+    public Duration getRemoveAbandonedTimeout() {
+        return removeAbandonedTimeout;
+    }
+
+    public void setRemoveAbandonedOnBorrow(boolean removeAbandonedOnBorrow) {
+        this.removeAbandonedOnBorrow = removeAbandonedOnBorrow;
+    }
+
+    public boolean getRemoveAbandonedOnBorrow() {
+        return removeAbandonedOnBorrow;
+    }
+
+    public void setRemoveAbandonedOnMaintenance(boolean removeAbandonedOnMaintenance) {
+        this.removeAbandonedOnMaintenance = removeAbandonedOnMaintenance;
+    }
+
+    public boolean getRemoveAbandonedOnMaintenance() {
+        return removeAbandonedOnMaintenance;
+    }
+
+    public void setRemoveAbandonedLogging(boolean removeAbandonedLogging) {
+        this.removeAbandonedLogging = removeAbandonedLogging;
+    }
+
+    public boolean getRemoveAbandonedLogging() {
+        return removeAbandonedLogging;
+    }
+
+    public AbandonedConfig getAbandonedConfig() {
+        AbandonedConfig abandonedConfig = null;
+        if (removeAbandonedTimeout != null) {
+            abandonedConfig = new AbandonedConfig();
+            abandonedConfig.setRemoveAbandonedTimeout(removeAbandonedTimeout);
+            if (removeAbandonedLogging) {
+                abandonedConfig.setLogAbandoned(removeAbandonedLogging);
+                abandonedConfig.setLogWriter(new PrintWriter(System.out, true, StandardCharsets.UTF_8));
+            }
+            abandonedConfig.setRemoveAbandonedOnBorrow(removeAbandonedOnBorrow);
+            abandonedConfig.setRemoveAbandonedOnMaintenance(removeAbandonedOnMaintenance);
+        }
+        return abandonedConfig;
+    }
+}

balancer/src/main/java/timely/balancer/configuration/SpringBootstrap.java

@@ -1,7 +0,0 @@
-package timely.balancer.configuration;
-
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-
-@SpringBootApplication(scanBasePackageClasses = { SpringBootstrap.class })
-public class SpringBootstrap {
-}

balancer/src/main/java/timely/balancer/connection/TimelyBalancedHost.java

@@ -1,19 +1,17 @@
 package timely.balancer.connection;
 
-import java.util.Timer;
-
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 import org.apache.commons.lang3.builder.ToStringBuilder;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
 import timely.balancer.ArrivalRate;
-import timely.balancer.configuration.BalancerConfiguration;
+import timely.balancer.configuration.BalancerProperties;
 
 public class TimelyBalancedHost {
 
-    private static final Logger LOG = LoggerFactory.getLogger(TimelyBalancedHost.class);
+    private static final Logger log = LoggerFactory.getLogger(TimelyBalancedHost.class);
-    static private Timer arrivalRateTimer = new Timer("ArrivalRateTimerTBH", true);
 
     private String host;
     private int tcpPort;
@@ -21,41 +19,30 @@ public class TimelyBalancedHost {
     private int wsPort;
     private int udpPort;
     private boolean isUp = true;
-    private BalancerConfiguration balancerConfig;
+    private BalancerProperties balancerProperties;
     private int failures = 0;
     private int successes = 0;
-    private ArrivalRate arrivalRate = new ArrivalRate(arrivalRateTimer);
+    private ArrivalRate arrivalRate = null;
 
-    public TimelyBalancedHost() {
+    private TimelyBalancedHost() {
 
     }
 
-    public TimelyBalancedHost(String host, int tcpPort, int httpPort, int wsPort, int udpPort) {
+    private TimelyBalancedHost(String host, int tcpPort, int httpPort, int wsPort, int udpPort, ArrivalRate arrivalRate) {
         this.host = host;
         this.tcpPort = tcpPort;
         this.httpPort = httpPort;
         this.wsPort = wsPort;
         this.udpPort = udpPort;
+        this.arrivalRate = arrivalRate;
     }
 
-    public TimelyBalancedHost(String host, int basePort) {
+    static public TimelyBalancedHost of(String host, int tcpPort, int httpPort, int wsPort, int udpPort, ArrivalRate arrivalRate) {
-        this.host = host;
+        return new TimelyBalancedHost(host, tcpPort, httpPort, wsPort, udpPort, arrivalRate);
-        this.tcpPort = basePort;
-        this.httpPort = basePort + 1;
-        this.wsPort = basePort + 2;
-        this.udpPort = basePort + 3;
     }
 
-    static public TimelyBalancedHost of(String host, int tcpPort, int httpPort, int wsPort, int udpPort) {
+    public void setBalancerProperties(BalancerProperties balancerProperties) {
-        return new TimelyBalancedHost(host, tcpPort, httpPort, wsPort, udpPort);
+        this.balancerProperties = balancerProperties;
-    }
-
-    static public TimelyBalancedHost of(String host, int basePort) {
-        return new TimelyBalancedHost(host, basePort);
-    }
-
-    public void setBalancerConfig(BalancerConfiguration balancerConfig) {
-        this.balancerConfig = balancerConfig;
     }
 
     synchronized public boolean isUp() {
@@ -63,38 +50,38 @@ public class TimelyBalancedHost {
     }
 
     public void reportSuccess() {
-        int serverSuccessesBeforeUp = balancerConfig.getServerSuccessesBeforeUp();
+        int serverSuccessesBeforeUp = balancerProperties.getServerSuccessesBeforeUp();
         String h = host;
         int p = tcpPort;
         synchronized (this) {
-            if (LOG.isTraceEnabled()) {
+            if (log.isTraceEnabled()) {
-                LOG.trace("success reported host:{} port:{} isUp:{} successes:{} serverSuccessesBeforeUp:{}", h, p,
+                log.trace("success reported host:{} port:{} isUp:{} successes:{} serverSuccessesBeforeUp:{}", h, p, isUp, (successes + 1),
-                        isUp, (successes + 1), serverSuccessesBeforeUp);
+                                serverSuccessesBeforeUp);
             }
             if (!isUp) {
                 if (++successes >= serverSuccessesBeforeUp) {
                     isUp = true;
                     successes = 0;
-                    LOG.info("host up host:{} port:{}", h, p);
+                    log.info("host up host:{} port:{}", h, p);
                 }
             }
         }
     }
 
     public void reportFailure() {
-        int serverFailuresBeforeDown = balancerConfig.getServerFailuresBeforeDown();
+        int serverFailuresBeforeDown = balancerProperties.getServerFailuresBeforeDown();
         String h = host;
         int p = tcpPort;
         synchronized (this) {
-            if (LOG.isTraceEnabled()) {
+            if (log.isTraceEnabled()) {
-                LOG.trace("failure reported host:{} port:{} isUp:{} failures:{} serverFailuresBeforeUp:{}", h, p, isUp,
+                log.trace("failure reported host:{} port:{} isUp:{} failures:{} serverFailuresBeforeUp:{}", h, p, isUp, (failures + 1),
-                        (failures + 1), serverFailuresBeforeDown);
+                                serverFailuresBeforeDown);
             }
             if (isUp) {
                 if (++failures >= serverFailuresBeforeDown) {
                     isUp = false;
                     failures = 0;
-                    LOG.info("host down host:{} port:{}", h, p);
+                    log.info("host down host:{} port:{}", h, p);
                 }
             }
         }
@@ -141,11 +128,17 @@ public class TimelyBalancedHost {
     }
 
     public void arrived() {
-        arrivalRate.arrived();
+        if (this.arrivalRate != null) {
+            this.arrivalRate.arrived();
+        }
     }
 
     public double getArrivalRate() {
-        return arrivalRate.getRate();
+        if (this.arrivalRate == null) {
+            return 0;
+        } else {
+            return this.arrivalRate.getRate();
+        }
     }
 
     @Override

balancer/src/main/java/timely/balancer/connection/http/HttpClientFactory.java

@@ -6,24 +6,26 @@ import org.apache.commons.pool2.KeyedPooledObjectFactory;
 import org.apache.commons.pool2.PooledObject;
 import org.apache.commons.pool2.impl.DefaultPooledObject;
 import org.apache.http.impl.client.CloseableHttpClient;
-import timely.balancer.configuration.BalancerSecurity;
-import timely.balancer.connection.TimelyBalancedHost;
 
-public class HttpClientFactory implements KeyedPooledObjectFactory<TimelyBalancedHost, CloseableHttpClient> {
+import timely.balancer.connection.TimelyBalancedHost;
+import timely.client.http.HttpClient;
+import timely.common.configuration.SslClientProperties;
+
+public class HttpClientFactory implements KeyedPooledObjectFactory<TimelyBalancedHost,CloseableHttpClient> {
 
     private final SSLContext sslContext;
-    private final BalancerSecurity security;
+    private SslClientProperties sslClientProperties;
 
-    public HttpClientFactory(BalancerSecurity security, SSLContext sslContext) {
+    public HttpClientFactory(SSLContext sslContext, SslClientProperties sslClientProperties) {
-        this.security = security;
         this.sslContext = sslContext;
+        this.sslClientProperties = sslClientProperties;
     }
 
     @Override
     public PooledObject<CloseableHttpClient> makeObject(TimelyBalancedHost k) throws Exception {
         // disable cookie management because we are sharing connections
-        return new DefaultPooledObject<>(timely.client.http.HttpClient.get(this.sslContext, null,
+        return new DefaultPooledObject<>(
-                security.getClientSsl().isHostVerificationEnabled(), security.getClientSsl().isUseClientCert()));
+                        HttpClient.get(this.sslContext, null, sslClientProperties.isHostVerificationEnabled(), sslClientProperties.isUseClientCert()));
     }
 
     @Override

balancer/src/main/java/timely/balancer/connection/http/HttpClientPool.java

@@ -4,13 +4,14 @@ import javax.net.ssl.SSLContext;
 
 import org.apache.commons.pool2.impl.GenericKeyedObjectPool;
 import org.apache.http.impl.client.CloseableHttpClient;
-import timely.balancer.configuration.BalancerHttp;
+
-import timely.balancer.configuration.BalancerSecurity;
+import timely.balancer.configuration.BalancerHttpProperties;
 import timely.balancer.connection.TimelyBalancedHost;
+import timely.common.configuration.SslClientProperties;
 
-public class HttpClientPool extends GenericKeyedObjectPool<TimelyBalancedHost, CloseableHttpClient> {
+public class HttpClientPool extends GenericKeyedObjectPool<TimelyBalancedHost,CloseableHttpClient> {
 
-    public HttpClientPool(BalancerSecurity balancerSecurity, BalancerHttp http, SSLContext sslContext) {
+    public HttpClientPool(BalancerHttpProperties config, SSLContext sslContext, SslClientProperties sslClientProperties) {
-        super(new HttpClientFactory(balancerSecurity, sslContext), http.getHttpClientPool());
+        super(new HttpClientFactory(sslContext, sslClientProperties), config.getHttpClientPool(), config.getHttpClientPool().getAbandonedConfig());
     }
 }

balancer/src/main/java/timely/balancer/connection/tcp/TcpClientFactory.java

@@ -5,10 +5,11 @@ import java.io.IOException;
 import org.apache.commons.pool2.KeyedPooledObjectFactory;
 import org.apache.commons.pool2.PooledObject;
 import org.apache.commons.pool2.impl.DefaultPooledObject;
+
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.client.tcp.TcpClient;
 
-public class TcpClientFactory implements KeyedPooledObjectFactory<TimelyBalancedHost, TcpClient> {
+public class TcpClientFactory implements KeyedPooledObjectFactory<TimelyBalancedHost,TcpClient> {
 
     private int bufferSize;
 

balancer/src/main/java/timely/balancer/connection/tcp/TcpClientPool.java

@@ -1,13 +1,14 @@
 package timely.balancer.connection.tcp;
 
 import org.apache.commons.pool2.impl.GenericKeyedObjectPool;
-import timely.balancer.configuration.BalancerConfiguration;
+
+import timely.balancer.configuration.BalancerServerProperties;
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.client.tcp.TcpClient;
 
-public class TcpClientPool extends GenericKeyedObjectPool<TimelyBalancedHost, TcpClient> {
+public class TcpClientPool extends GenericKeyedObjectPool<TimelyBalancedHost,TcpClient> {
 
-    public TcpClientPool(BalancerConfiguration config) {
+    public TcpClientPool(BalancerServerProperties config) {
-        super(new TcpClientFactory(config.getServer().getTcpBufferSize()), config.getServer().getTcpClientPool());
+        super(new TcpClientFactory(config.getTcpBufferSize()), config.getTcpClientPool(), config.getTcpClientPool().getAbandonedConfig());
     }
 }

balancer/src/main/java/timely/balancer/connection/udp/UdpClientFactory.java

@@ -5,13 +5,13 @@ import java.io.IOException;
 import org.apache.commons.pool2.KeyedPooledObjectFactory;
 import org.apache.commons.pool2.PooledObject;
 import org.apache.commons.pool2.impl.DefaultPooledObject;
+
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.client.udp.UdpClient;
 
-public class UdpClientFactory implements KeyedPooledObjectFactory<TimelyBalancedHost, UdpClient> {
+public class UdpClientFactory implements KeyedPooledObjectFactory<TimelyBalancedHost,UdpClient> {
 
-    public UdpClientFactory() {
+    public UdpClientFactory() {}
-    }
 
     @Override
     public PooledObject<UdpClient> makeObject(TimelyBalancedHost k) throws Exception {

balancer/src/main/java/timely/balancer/connection/udp/UdpClientPool.java

@@ -1,13 +1,14 @@
 package timely.balancer.connection.udp;
 
 import org.apache.commons.pool2.impl.GenericKeyedObjectPool;
-import timely.balancer.configuration.BalancerConfiguration;
+
+import timely.balancer.configuration.BalancerServerProperties;
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.client.udp.UdpClient;
 
-public class UdpClientPool extends GenericKeyedObjectPool<TimelyBalancedHost, UdpClient> {
+public class UdpClientPool extends GenericKeyedObjectPool<TimelyBalancedHost,UdpClient> {
 
-    public UdpClientPool(BalancerConfiguration config) {
+    public UdpClientPool(BalancerServerProperties config) {
-        super(new UdpClientFactory(), config.getServer().getUdpClientPool());
+        super(new UdpClientFactory(), config.getUdpClientPool(), config.getUdpClientPool().getAbandonedConfig());
     }
 }

balancer/src/main/java/timely/balancer/connection/ws/WsClientFactory.java

@@ -5,28 +5,35 @@ import javax.net.ssl.SSLContext;
 import org.apache.commons.pool2.KeyedPooledObjectFactory;
 import org.apache.commons.pool2.PooledObject;
 import org.apache.commons.pool2.impl.DefaultPooledObject;
-import timely.balancer.configuration.BalancerConfiguration;
+
+import timely.balancer.configuration.BalancerProperties;
+import timely.balancer.configuration.BalancerWebsocketProperties;
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.client.websocket.subscription.WebSocketSubscriptionClient;
+import timely.common.configuration.SslClientProperties;
 
-public class WsClientFactory implements KeyedPooledObjectFactory<TimelyBalancedHost, WebSocketSubscriptionClient> {
+public class WsClientFactory implements KeyedPooledObjectFactory<TimelyBalancedHost,WebSocketSubscriptionClient> {
 
     private final SSLContext sslContext;
-    private BalancerConfiguration balancerConfig;
+    private BalancerProperties balancerProperties;
+    private BalancerWebsocketProperties balancerWebsocketProperties;
+    private SslClientProperties sslClientProperties;
 
-    public WsClientFactory(BalancerConfiguration balancerConfig, SSLContext sslContext) {
+    public WsClientFactory(BalancerProperties balancerProperties, BalancerWebsocketProperties balancerWebsocketProperties,
-        this.balancerConfig = balancerConfig;
+                    SslClientProperties sslClientProperties, SSLContext sslContext) {
+        this.balancerProperties = balancerProperties;
+        this.balancerWebsocketProperties = balancerWebsocketProperties;
+        this.sslClientProperties = sslClientProperties;
         this.sslContext = sslContext;
     }
 
     @Override
     public PooledObject<WebSocketSubscriptionClient> makeObject(TimelyBalancedHost k) throws Exception {
 
-        int bufferSize = balancerConfig.getWebsocket().getIncomingBufferSize();
+        int bufferSize = balancerWebsocketProperties.getIncomingBufferSize();
-        WebSocketSubscriptionClient client = new WebSocketSubscriptionClient(sslContext, k.getHost(), k.getHttpPort(),
+        WebSocketSubscriptionClient client = new WebSocketSubscriptionClient(sslContext, k.getHost(), k.getHttpPort(), k.getWsPort(),
-                k.getWsPort(), balancerConfig.getSecurity().getClientSsl().isUseClientCert(),
+                        sslClientProperties.isUseClientCert(), balancerProperties.isLoginRequired(), sslClientProperties.isHostVerificationEnabled(),
-                balancerConfig.isLoginRequired(), "", "",
+                        bufferSize);
-                balancerConfig.getSecurity().getClientSsl().isHostVerificationEnabled(), bufferSize);
         return new DefaultPooledObject<>(client);
     }
 

balancer/src/main/java/timely/balancer/connection/ws/WsClientPool.java

@@ -3,13 +3,18 @@ package timely.balancer.connection.ws;
 import javax.net.ssl.SSLContext;
 
 import org.apache.commons.pool2.impl.GenericKeyedObjectPool;
-import timely.balancer.configuration.BalancerConfiguration;
+
+import timely.balancer.configuration.BalancerProperties;
+import timely.balancer.configuration.BalancerWebsocketProperties;
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.client.websocket.subscription.WebSocketSubscriptionClient;
+import timely.common.configuration.SslClientProperties;
 
-public class WsClientPool extends GenericKeyedObjectPool<TimelyBalancedHost, WebSocketSubscriptionClient> {
+public class WsClientPool extends GenericKeyedObjectPool<TimelyBalancedHost,WebSocketSubscriptionClient> {
 
-    public WsClientPool(BalancerConfiguration balancerConfig, SSLContext sslContext) {
+    public WsClientPool(BalancerProperties balancerProperties, BalancerWebsocketProperties config, SslClientProperties sslClientProperties,
-        super(new WsClientFactory(balancerConfig, sslContext), balancerConfig.getWebsocket().getWsClientPool());
+                    SSLContext sslContext) {
+        super(new WsClientFactory(balancerProperties, config, sslClientProperties, sslContext), config.getWsClientPool(),
+                        config.getWsClientPool().getAbandonedConfig());
     }
 }

balancer/src/main/java/timely/balancer/healthcheck/HealthChecker.java

@@ -1,53 +0,0 @@
-package timely.balancer.healthcheck;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Timer;
-import java.util.TimerTask;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import timely.balancer.configuration.BalancerConfiguration;
-import timely.balancer.connection.TimelyBalancedHost;
-import timely.balancer.connection.tcp.TcpClientPool;
-
-public class HealthChecker {
-
-    private static final Logger LOG = LoggerFactory.getLogger(HealthChecker.class);
-    private List<TimelyBalancedHost> timelyHosts = new ArrayList<>();
-    private Timer timer;
-    final private TCPServerHealthCheck tcpServerHealthCheck;
-    private TimerTask check = new TimerTask() {
-
-        @Override
-        public void run() {
-            synchronized (timelyHosts) {
-                for (TimelyBalancedHost h : timelyHosts) {
-                    try {
-                        if (tcpServerHealthCheck.isServerHealthy(h)) {
-                            h.reportSuccess();
-                        } else {
-                            h.reportFailure();
-                        }
-                    } catch (Exception e) {
-                        LOG.error(e.getMessage(), e);
-                        h.reportFailure();
-                    }
-                }
-            }
-        }
-    };
-
-    public HealthChecker(BalancerConfiguration config, TcpClientPool tcpClientPool) {
-        this.tcpServerHealthCheck = new TCPServerHealthCheck(tcpClientPool);
-        this.timer = new Timer("HealthCheckerThread", true);
-        this.timer.scheduleAtFixedRate(check, 0, config.getCheckServerHealthInterval());
-    }
-
-    public void setTimelyHosts(List<TimelyBalancedHost> timelyHosts) {
-        synchronized (timelyHosts) {
-            this.timelyHosts.clear();
-            this.timelyHosts.addAll(timelyHosts);
-        }
-    }
-}

balancer/src/main/java/timely/balancer/netty/http/HttpRelayHandler.java

@@ -3,6 +3,7 @@ package timely.balancer.netty.http;
 import static io.netty.handler.codec.http.HttpHeaderNames.CONTENT_LENGTH;
 
 import java.io.ByteArrayOutputStream;
+import java.io.IOException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
@@ -10,8 +11,29 @@ import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
 
+import org.apache.http.Header;
+import org.apache.http.client.config.RequestConfig;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.client.methods.HttpRequestBase;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.message.BasicHeader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.util.StreamUtils;
+
+import com.google.common.base.Throwables;
 import com.google.common.collect.Multimap;
+
 import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.SimpleChannelInboundHandler;
@@ -21,38 +43,30 @@ import io.netty.handler.codec.http.FullHttpResponse;
 import io.netty.handler.codec.http.HttpMethod;
 import io.netty.handler.codec.http.HttpResponseStatus;
 import io.netty.handler.codec.http.HttpVersion;
-import io.netty.util.ReferenceCountUtil;
-import org.apache.http.Header;
-import org.apache.http.client.methods.CloseableHttpResponse;
-import org.apache.http.client.methods.HttpGet;
-import org.apache.http.client.methods.HttpPost;
-import org.apache.http.client.methods.HttpUriRequest;
-import org.apache.http.entity.StringEntity;
-import org.apache.http.impl.client.CloseableHttpClient;
-import org.apache.http.message.BasicHeader;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.util.StreamUtils;
 import timely.api.request.AuthenticatedRequest;
+import timely.api.request.HttpRequest;
 import timely.api.request.MetricRequest;
-import timely.api.request.timeseries.HttpRequest;
 import timely.api.request.timeseries.QueryRequest;
 import timely.api.response.TimelyException;
+import timely.auth.TimelyAuthenticationToken;
 import timely.auth.util.HttpHeaderUtils;
 import timely.auth.util.ProxiedEntityUtils;
+import timely.balancer.MetricResolver;
+import timely.balancer.configuration.BalancerHttpProperties;
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.balancer.connection.http.HttpClientPool;
-import timely.balancer.resolver.MetricResolver;
 import timely.netty.http.TimelyHttpHandler;
-import timely.netty.http.auth.TimelyAuthenticationToken;
 
 public class HttpRelayHandler extends SimpleChannelInboundHandler<HttpRequest> implements TimelyHttpHandler {
 
-    private static final Logger LOG = LoggerFactory.getLogger(HttpRelayHandler.class);
+    private static final Logger log = LoggerFactory.getLogger(HttpRelayHandler.class);
+    private BalancerHttpProperties balancerHttpProperties;
     private final HttpClientPool httpClientPool;
     private MetricResolver metricResolver;
+    private ExecutorService requestExecutor = Executors.newCachedThreadPool();
 
-    public HttpRelayHandler(MetricResolver metricResolver, HttpClientPool httpClientPool) {
+    public HttpRelayHandler(BalancerHttpProperties balancerHttpProperties, MetricResolver metricResolver, HttpClientPool httpClientPool) {
+        this.balancerHttpProperties = balancerHttpProperties;
         this.metricResolver = metricResolver;
         this.httpClientPool = httpClientPool;
     }
@@ -65,6 +79,7 @@ public class HttpRelayHandler extends SimpleChannelInboundHandler<HttpRequest> i
         CloseableHttpResponse relayedResponse = null;
         FullHttpRequest request = null;
         try {
+            String relayURI = "";
             try {
                 request = msg.getHttpRequest();
                 String originalURI = request.uri();
@@ -88,7 +103,7 @@ public class HttpRelayHandler extends SimpleChannelInboundHandler<HttpRequest> i
                 }
                 client = httpClientPool.borrowObject(k);
 
-                Multimap<String, String> headers = HttpHeaderUtils.toMultimap(request.headers());
+                Multimap<String,String> headers = HttpHeaderUtils.toMultimap(request.headers());
                 if (msg instanceof AuthenticatedRequest) {
                     AuthenticatedRequest authenticatedRequest = (AuthenticatedRequest) msg;
                     TimelyAuthenticationToken token = authenticatedRequest.getToken();
@@ -100,69 +115,62 @@ public class HttpRelayHandler extends SimpleChannelInboundHandler<HttpRequest> i
                 }
 
                 List<Header> relayedHeaderList = new ArrayList<>();
-                for (Map.Entry<String, String> h : headers.entries()) {
+                for (Map.Entry<String,String> h : headers.entries()) {
                     if (!h.getKey().equals(CONTENT_LENGTH.toString())) {
                         relayedHeaderList.add(new BasicHeader(h.getKey(), h.getValue()));
                     }
                 }
                 Header[] headerArray = new Header[relayedHeaderList.size()];
                 relayedHeaderList.toArray(headerArray);
-
+                relayURI = "https://" + k.getHost() + ":" + k.getHttpPort() + originalURI;
-                String relayURI = "https://" + k.getHost() + ":" + k.getHttpPort() + originalURI;
+                HttpRequestBase relayedRequest = null;
                 if (request.method().equals(HttpMethod.GET)) {
-                    HttpUriRequest relayedRequest = new HttpGet(relayURI);
+                    relayedRequest = new HttpGet(relayURI);
-                    if (headerArray.length > 0) {
-                        relayedRequest.setHeaders(headerArray);
-                    }
-                    relayedResponse = client.execute(relayedRequest);
-
                 } else if (request.method().equals(HttpMethod.POST)) {
-                    HttpPost relayedRequest = new HttpPost(relayURI);
+                    relayedRequest = new HttpPost(relayURI);
-
                     String content = request.content().toString(StandardCharsets.UTF_8);
                     StringEntity entity = new StringEntity(content);
-                    relayedRequest.setEntity(entity);
+                    ((HttpPost) relayedRequest).setEntity(entity);
-                    if (headerArray.length > 0) {
+                } else {
-                        relayedRequest.setHeaders(headerArray);
+                    throw new IllegalArgumentException("Unsupported HTTP method: " + request.method());
-                    }
-                    relayedResponse = client.execute(relayedRequest);
                 }
+                if (headerArray.length > 0) {
+                    relayedRequest.setHeaders(headerArray);
+                }
+                relayedResponse = executeHttpRequest(client, relayedRequest, balancerHttpProperties.getRequestTimeout());
+            } catch (IOException e) {
+                String message = String.format("%s calling %s", e.getMessage() == null ? "" : e.getMessage(), relayURI);
+                log.error(message, e);
+                this.sendHttpError(ctx, new TimelyException(HttpResponseStatus.GATEWAY_TIMEOUT.code(), e.getMessage(), e.getLocalizedMessage(), e));
+                return;
             } catch (Exception e) {
                 String message = e.getMessage();
-                if (message == null) {
+                if (message != null && message.contains("No matching tags")) {
-                    LOG.error("", e);
+                    log.trace(message);
                 } else {
-                    if (message.contains("No matching tags")) {
+                    message = String.format("%s calling %s", e.getMessage() == null ? "" : e.getMessage(), relayURI);
-                        LOG.trace(message);
+                    log.error(message, e);
-                    } else {
-                        LOG.error(message, e);
-                    }
                 }
-                this.sendHttpError(ctx, new TimelyException(HttpResponseStatus.INTERNAL_SERVER_ERROR.code(),
+                this.sendHttpError(ctx, new TimelyException(HttpResponseStatus.INTERNAL_SERVER_ERROR.code(), e.getMessage(), e.getLocalizedMessage(), e));
-                        e.getMessage(), e.getLocalizedMessage(), e));
                 return;
-            } finally {
-                if (request != null && request instanceof AutoCloseable) {
-                    ReferenceCountUtil.release(request);
-                }
             }
-            FullHttpResponse response = null;
+            FullHttpResponse response;
             if (relayedResponse == null) {
-                this.sendHttpError(ctx, new TimelyException(HttpResponseStatus.METHOD_NOT_ALLOWED.code(),
+                this.sendHttpError(ctx, new TimelyException(HttpResponseStatus.METHOD_NOT_ALLOWED.code(), "Method not allowed", "Method not allowed"));
-                        "Method not allowed", "Method not allowed"));
             } else {
                 ByteArrayOutputStream baos = new MyByteArrayOutputStream();
                 StreamUtils.copy(relayedResponse.getEntity().getContent(), baos);
 
-                response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,
+                response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.valueOf(relayedResponse.getStatusLine().getStatusCode()),
-                        HttpResponseStatus.valueOf(relayedResponse.getStatusLine().getStatusCode()),
+                                Unpooled.copiedBuffer(baos.toByteArray()));
-                        Unpooled.copiedBuffer(baos.toByteArray()));
                 for (Header h : relayedResponse.getAllHeaders()) {
                     response.headers().add(h.getName(), h.getValue());
                 }
                 response.headers().set(CONTENT_LENGTH, response.content().readableBytes());
                 sendResponse(ctx, response);
             }
+        } catch (Exception e) {
+            log.error(e.getMessage(), e);
         } finally {
             if (relayedResponse != null) {
                 relayedResponse.close();
@@ -170,15 +178,14 @@ public class HttpRelayHandler extends SimpleChannelInboundHandler<HttpRequest> i
             if (client != null && k != null) {
                 httpClientPool.returnObject(k, client);
             } else {
-                LOG.error("NOT RETURNING CONNECTION! " + msg.getHttpRequest().uri());
+                log.error("NOT RETURNING CONNECTION! " + msg.getHttpRequest().uri());
             }
         }
     }
 
     static public class MyByteArrayOutputStream extends ByteArrayOutputStream {
 
-        public MyByteArrayOutputStream() {
+        public MyByteArrayOutputStream() {}
-        }
 
         public MyByteArrayOutputStream(int size) {
             super(size);
@@ -202,4 +209,22 @@ public class HttpRelayHandler extends SimpleChannelInboundHandler<HttpRequest> i
         }
         return s;
     }
+
+    private CloseableHttpResponse executeHttpRequest(CloseableHttpClient httpClient, HttpRequestBase relayedRequest, long timeout) throws Exception {
+        try {
+            RequestConfig.Builder requestConfigBuilder = RequestConfig.custom();
+            requestConfigBuilder.setConnectionRequestTimeout(this.balancerHttpProperties.getConnectionRequestTimeout());
+            requestConfigBuilder.setConnectTimeout(this.balancerHttpProperties.getConnectTimeout());
+            requestConfigBuilder.setSocketTimeout(this.balancerHttpProperties.getSocketTimeout());
+            RequestConfig requestConfig = requestConfigBuilder.build();
+            relayedRequest.setConfig(requestConfig);
+            Future<CloseableHttpResponse> f = requestExecutor.submit(() -> httpClient.execute(relayedRequest));
+            return f.get(timeout, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException | ExecutionException | TimeoutException e) {
+            Throwable cause = Throwables.getRootCause(e);
+            throw new IOException(cause.getMessage(), cause);
+        } catch (Exception e) {
+            throw e;
+        }
+    }
 }

balancer/src/main/java/timely/balancer/netty/tcp/TcpRelayHandler.java

@@ -1,50 +1,43 @@
 package timely.balancer.netty.tcp;
 
-import java.io.IOException;
 import java.nio.charset.StandardCharsets;
-import java.util.List;
+
+import org.apache.commons.lang3.tuple.Pair;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelFuture;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.SimpleChannelInboundHandler;
-import org.apache.commons.lang3.tuple.Pair;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import timely.api.request.MetricRequest;
 import timely.api.request.TcpRequest;
+import timely.balancer.MetricResolver;
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.balancer.connection.tcp.TcpClientPool;
-import timely.balancer.resolver.BalancedMetricResolver;
-import timely.balancer.resolver.MetricResolver;
 import timely.client.tcp.TcpClient;
 import timely.netty.Constants;
 
 public class TcpRelayHandler extends SimpleChannelInboundHandler<TcpRequest> {
 
-    private static final Logger LOG = LoggerFactory.getLogger(TcpRelayHandler.class);
+    private static final Logger log = LoggerFactory.getLogger(TcpRelayHandler.class);
     private static final String LOG_ERR_MSG = "Error storing put metric: {}";
     private static final String ERR_MSG = "Error storing put metric: ";
 
-    private BalancedMetricResolver metricResolver;
+    private MetricResolver metricResolver;
-    private List<TcpClientPool> tcpClientPools;
+    private TcpClientPool tcpClientPool;
 
-    public TcpRelayHandler(MetricResolver metricResolver, List<TcpClientPool> tcpClientPools) {
+    public TcpRelayHandler(MetricResolver metricResolver, TcpClientPool tcpClientPool) {
-        this.metricResolver = (BalancedMetricResolver) metricResolver;
+        this.metricResolver = metricResolver;
-        this.tcpClientPools = tcpClientPools;
+        this.tcpClientPool = tcpClientPool;
-    }
-
-    private TcpClientPool tcpClientPool() {
-        int x = Math.toIntExact(Thread.currentThread().getId() % tcpClientPools.size());
-        return tcpClientPools.get(x);
     }
 
     @Override
     protected void channelRead0(ChannelHandlerContext ctx, TcpRequest msg) throws Exception {
-        LOG.trace("Received {}", msg);
+        log.trace("Received {}", msg);
         try {
             String line;
-            Pair<TimelyBalancedHost, TcpClient> keyClientPair = null;
+            Pair<TimelyBalancedHost,TcpClient> keyClientPair = null;
             try {
                 if (msg instanceof MetricRequest) {
                     String metricName = ((MetricRequest) msg).getMetric().getName();
@@ -58,34 +51,34 @@ public class TcpRelayHandler extends SimpleChannelInboundHandler<TcpRequest> {
                 keyClientPair.getRight().write(line + "\n");
             } finally {
                 if (keyClientPair != null && keyClientPair.getLeft() != null && keyClientPair.getRight() != null) {
-                    tcpClientPool().returnObject(keyClientPair.getLeft(), keyClientPair.getRight());
+                    tcpClientPool.returnObject(keyClientPair.getLeft(), keyClientPair.getRight());
                 }
             }
 
-        } catch (IOException e) {
+        } catch (Exception e) {
-            LOG.error(LOG_ERR_MSG, msg, e);
+            log.error(LOG_ERR_MSG, msg, e);
-            ChannelFuture cf = ctx.writeAndFlush(
+            ChannelFuture cf = ctx.writeAndFlush(Unpooled.copiedBuffer((ERR_MSG + e.getMessage() + "\n").getBytes(StandardCharsets.UTF_8)));
-                    Unpooled.copiedBuffer((ERR_MSG + e.getMessage() + "\n").getBytes(StandardCharsets.UTF_8)));
             if (!cf.isSuccess()) {
-                LOG.error(Constants.ERR_WRITING_RESPONSE, cf.cause());
+                Throwable t = cf.cause();
+                String message = (t == null) ? "" : t.getMessage();
+                log.error(String.format(Constants.ERR_WRITING_RESPONSE, message), cf.cause());
             }
         }
     }
 
-    private Pair<TimelyBalancedHost, TcpClient> getClient(String metric, boolean metricRequest) {
+    private Pair<TimelyBalancedHost,TcpClient> getClient(String metric, boolean metricRequest) {
         TcpClient client = null;
         TimelyBalancedHost k = null;
         int failures = 0;
         while (client == null) {
             try {
-                k = (metricRequest == true) ? metricResolver.getHostPortKeyIngest(metric)
+                k = (metricRequest == true) ? metricResolver.getHostPortKeyIngest(metric) : metricResolver.getHostPortKey(metric);
-                        : metricResolver.getHostPortKey(metric);
+                client = tcpClientPool.borrowObject(k);
-                client = tcpClientPool().borrowObject(k);
             } catch (Exception e1) {
                 failures++;
                 client = null;
                 if (failures % 10 == 0) {
-                    LOG.error(e1.getMessage(), e1);
+                    log.error(e1.getMessage(), e1);
                 }
                 try {
                     Thread.sleep(failures < 10 ? 500 : 60000);

balancer/src/main/java/timely/balancer/netty/udp/UdpRelayHandler.java

@@ -2,24 +2,25 @@ package timely.balancer.netty.udp;
 
 import java.nio.charset.StandardCharsets;
 
+import org.apache.commons.lang3.tuple.Pair;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelFuture;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.SimpleChannelInboundHandler;
-import org.apache.commons.lang3.tuple.Pair;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import timely.api.request.MetricRequest;
 import timely.api.request.UdpRequest;
+import timely.balancer.MetricResolver;
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.balancer.connection.udp.UdpClientPool;
-import timely.balancer.resolver.MetricResolver;
 import timely.client.udp.UdpClient;
 import timely.netty.Constants;
 
 public class UdpRelayHandler extends SimpleChannelInboundHandler<UdpRequest> {
 
-    private static final Logger LOG = LoggerFactory.getLogger(UdpRelayHandler.class);
+    private static final Logger log = LoggerFactory.getLogger(UdpRelayHandler.class);
     private static final String LOG_ERR_MSG = "Error storing put metric: {}";
     private static final String ERR_MSG = "Error storing put metric: ";
 
@@ -33,11 +34,11 @@ public class UdpRelayHandler extends SimpleChannelInboundHandler<UdpRequest> {
 
     @Override
     protected void channelRead0(ChannelHandlerContext ctx, UdpRequest msg) throws Exception {
-        LOG.trace("Received {}", msg);
+        log.trace("Received {}", msg);
         try {
             MetricRequest metricRequest = (MetricRequest) msg;
             String metricName = metricRequest.getMetric().getName();
-            Pair<TimelyBalancedHost, UdpClient> keyClientPair = null;
+            Pair<TimelyBalancedHost,UdpClient> keyClientPair = null;
             try {
                 keyClientPair = getClient(metricName, true);
                 keyClientPair.getRight().write(metricRequest.getLine() + "\n");
@@ -49,28 +50,28 @@ public class UdpRelayHandler extends SimpleChannelInboundHandler<UdpRequest> {
             }
 
         } catch (Exception e) {
-            LOG.error(LOG_ERR_MSG, msg, e);
+            log.error(LOG_ERR_MSG, msg, e);
-            ChannelFuture cf = ctx.writeAndFlush(
+            ChannelFuture cf = ctx.writeAndFlush(Unpooled.copiedBuffer((ERR_MSG + e.getMessage() + "\n").getBytes(StandardCharsets.UTF_8)));
-                    Unpooled.copiedBuffer((ERR_MSG + e.getMessage() + "\n").getBytes(StandardCharsets.UTF_8)));
             if (!cf.isSuccess()) {
-                LOG.error(Constants.ERR_WRITING_RESPONSE, cf.cause());
+                Throwable t = cf.cause();
+                String message = (t == null) ? "" : t.getMessage();
+                log.error(String.format(Constants.ERR_WRITING_RESPONSE, message), cf.cause());
             }
         }
     }
 
-    private Pair<TimelyBalancedHost, UdpClient> getClient(String metric, boolean metricRequest) {
+    private Pair<TimelyBalancedHost,UdpClient> getClient(String metric, boolean metricRequest) {
         UdpClient client = null;
         TimelyBalancedHost k = null;
         int failures = 0;
         while (client == null) {
             try {
-                k = (metricRequest == true) ? metricResolver.getHostPortKeyIngest(metric)
+                k = (metricRequest == true) ? metricResolver.getHostPortKeyIngest(metric) : metricResolver.getHostPortKey(metric);
-                        : metricResolver.getHostPortKey(metric);
                 client = udpClientPool.borrowObject(k);
             } catch (Exception e1) {
                 failures++;
                 client = null;
-                LOG.error(e1.getMessage(), e1);
+                log.error(e1.getMessage(), e1);
                 try {
                     Thread.sleep(failures < 10 ? 500 : 60000);
                 } catch (InterruptedException e2) {

balancer/src/main/java/timely/balancer/netty/ws/WsClientHandler.java

@@ -9,23 +9,25 @@ import javax.websocket.CloseReason;
 import javax.websocket.EndpointConfig;
 import javax.websocket.Session;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import com.google.common.collect.HashMultimap;
 import com.google.common.collect.Multimap;
+
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.http.HttpResponseStatus;
 import io.netty.handler.codec.http.websocketx.PingWebSocketFrame;
 import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
 import io.netty.util.concurrent.ScheduledFuture;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import timely.api.response.TimelyException;
+import timely.auth.TimelyAuthenticationToken;
 import timely.auth.util.ProxiedEntityUtils;
 import timely.client.websocket.ClientHandler;
-import timely.netty.http.auth.TimelyAuthenticationToken;
 
 public class WsClientHandler extends ClientHandler {
 
-    private static final Logger LOG = LoggerFactory.getLogger(WsClientHandler.class);
+    private static final Logger log = LoggerFactory.getLogger(WsClientHandler.class);
     private final ChannelHandlerContext ctx;
     private final TimelyAuthenticationToken token;
     private ScheduledFuture<?> ping;
@@ -34,22 +36,22 @@ public class WsClientHandler extends ClientHandler {
         this.ctx = ctx;
         this.token = token;
         this.ping = this.ctx.executor().scheduleAtFixedRate(() -> {
-            LOG.trace("Sending ping on channel {}", ctx.channel());
+            log.trace("Sending ping on channel {}", ctx.channel());
             ctx.writeAndFlush(new PingWebSocketFrame());
         }, pingRate, pingRate, TimeUnit.SECONDS);
     }
 
     @Override
-    public void beforeRequest(Map<String, List<String>> headers) {
+    public void beforeRequest(Map<String,List<String>> headers) {
         if (token.getClientCert() != null) {
-            Multimap<String, String> proxyRequestHeaders = HashMultimap.create();
+            Multimap<String,String> proxyRequestHeaders = HashMultimap.create();
             ProxiedEntityUtils.addProxyHeaders(proxyRequestHeaders, token.getClientCert());
             for (String s : proxyRequestHeaders.keySet()) {
                 headers.put(s, new ArrayList<>(proxyRequestHeaders.get(s)));
             }
         }
 
-        Multimap<String, String> originalRequestHeaders = token.getHttpHeaders();
+        Multimap<String,String> originalRequestHeaders = token.getHttpHeaders();
         for (String s : originalRequestHeaders.keySet()) {
             if (!headers.containsKey(s)) {
                 // add pre-existing values if key does not exist in proxyRequest
@@ -62,7 +64,7 @@ public class WsClientHandler extends ClientHandler {
     public void onOpen(Session session, EndpointConfig config) {
         session.addMessageHandler(String.class, message -> {
             ctx.writeAndFlush(new TextWebSocketFrame(message));
-            LOG.debug("Message received on Websocket session {}: {}", session.getId(), message);
+            log.debug("Message received on Websocket session {}: {}", session.getId(), message);
         });
     }
 
@@ -70,9 +72,8 @@ public class WsClientHandler extends ClientHandler {
     public void onClose(Session session, CloseReason reason) {
         super.onClose(session, reason);
         if (!reason.getCloseCode().equals(CloseReason.CloseCodes.NORMAL_CLOSURE)) {
-            LOG.error("Abnormal close: " + reason.getReasonPhrase());
+            log.error("Abnormal close: " + reason.getReasonPhrase());
-            Exception e = new TimelyException(HttpResponseStatus.INTERNAL_SERVER_ERROR.code(), reason.getReasonPhrase(),
+            Exception e = new TimelyException(HttpResponseStatus.INTERNAL_SERVER_ERROR.code(), reason.getReasonPhrase(), "");
-                    "");
             WsRelayHandler.sendErrorResponse(ctx, HttpResponseStatus.INTERNAL_SERVER_ERROR, e);
         }
         if (!ping.isCancelled()) {
@@ -83,7 +84,7 @@ public class WsClientHandler extends ClientHandler {
     @Override
     public void onError(Session session, Throwable t) {
         super.onError(session, t);
-        LOG.error(t.getMessage(), t);
+        log.error(t.getMessage(), t);
         Exception e = new TimelyException(HttpResponseStatus.INTERNAL_SERVER_ERROR.code(), t.getMessage(), "");
         WsRelayHandler.sendErrorResponse(ctx, HttpResponseStatus.INTERNAL_SERVER_ERROR, e);
         if (!ping.isCancelled()) {

balancer/src/main/java/timely/balancer/netty/ws/WsClientHolder.java

@@ -4,15 +4,16 @@ import java.io.IOException;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.balancer.connection.ws.WsClientPool;
 import timely.client.websocket.subscription.WebSocketSubscriptionClient;
 
 public class WsClientHolder {
 
-    private static final Logger LOG = LoggerFactory.getLogger(WsClientHolder.class);
+    private static final Logger log = LoggerFactory.getLogger(WsClientHolder.class);
-    private WebSocketSubscriptionClient client = null;
+    private WebSocketSubscriptionClient client;
-    private TimelyBalancedHost host = null;
+    private TimelyBalancedHost host;
 
     public WsClientHolder(TimelyBalancedHost host, WebSocketSubscriptionClient client) {
         this.host = host;
@@ -32,7 +33,7 @@ public class WsClientHolder {
             try {
                 client.close();
             } catch (IOException e) {
-                LOG.error("Error closing web socket client", e);
+                log.error("Error closing web socket client", e);
             }
             wsClientPool.returnObject(host, client);
             client = null;

balancer/src/main/java/timely/balancer/netty/ws/WsRelayHandler.java

@@ -5,11 +5,15 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
 import com.google.common.collect.Multimap;
+
 import io.netty.channel.ChannelFuture;
 import io.netty.channel.ChannelFutureListener;
 import io.netty.channel.ChannelHandlerContext;
@@ -17,32 +21,30 @@ import io.netty.channel.SimpleChannelInboundHandler;
 import io.netty.handler.codec.http.HttpResponseStatus;
 import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
 import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
-import org.slf4j.Logger;
+import timely.api.request.websocket.AddSubscription;
-import org.slf4j.LoggerFactory;
+import timely.api.request.websocket.CloseSubscription;
-import timely.api.request.subscription.AddSubscription;
+import timely.api.request.websocket.CreateSubscription;
-import timely.api.request.subscription.CloseSubscription;
+import timely.api.request.websocket.RemoveSubscription;
-import timely.api.request.subscription.CreateSubscription;
+import timely.api.request.websocket.SubscriptionRequest;
-import timely.api.request.subscription.RemoveSubscription;
-import timely.api.request.subscription.SubscriptionRequest;
 import timely.api.response.TimelyException;
 import timely.auth.util.ProxiedEntityUtils;
-import timely.balancer.configuration.BalancerConfiguration;
+import timely.balancer.MetricResolver;
+import timely.balancer.configuration.BalancerWebsocketProperties;
 import timely.balancer.connection.TimelyBalancedHost;
 import timely.balancer.connection.ws.WsClientPool;
-import timely.balancer.resolver.MetricResolver;
 import timely.client.websocket.subscription.WebSocketSubscriptionClient;
 import timely.netty.http.TimelyHttpHandler;
 
 public class WsRelayHandler extends SimpleChannelInboundHandler<SubscriptionRequest> implements TimelyHttpHandler {
 
-    private static final Logger LOG = LoggerFactory.getLogger(WsRelayHandler.class);
+    private static final Logger log = LoggerFactory.getLogger(WsRelayHandler.class);
 
-    private final BalancerConfiguration balancerConfig;
+    private BalancerWebsocketProperties balancerWebsocketProperties;
-    private final WsClientPool wsClientPool;
+    private WsClientPool wsClientPool;
     private MetricResolver metricResolver;
     static private ObjectMapper mapper;
-    Map<String, Map<String, WsClientHolder>> wsClients = new ConcurrentHashMap<>();
+    Map<String,Map<String,WsClientHolder>> wsClients = new ConcurrentHashMap<>();
-    Map<String, ChannelHandlerContext> wsSubscriptions = new ConcurrentHashMap<>();
+    Map<String,ChannelHandlerContext> wsSubscriptions = new ConcurrentHashMap<>();
 
     static {
         mapper = new ObjectMapper();
@@ -52,9 +54,8 @@ public class WsRelayHandler extends SimpleChannelInboundHandler<SubscriptionRequ
         mapper.configure(SerializationFeature.WRAP_ROOT_VALUE, true);
     }
 
-    public WsRelayHandler(BalancerConfiguration balancerConfig, MetricResolver metricResolver,
+    public WsRelayHandler(BalancerWebsocketProperties balancerWebsocketProperties, MetricResolver metricResolver, WsClientPool wsClientPool) {
-            WsClientPool wsClientPool) {
+        this.balancerWebsocketProperties = balancerWebsocketProperties;
-        this.balancerConfig = balancerConfig;
         this.metricResolver = metricResolver;
         this.wsClientPool = wsClientPool;
     }
@@ -67,7 +68,7 @@ public class WsRelayHandler extends SimpleChannelInboundHandler<SubscriptionRequ
         try {
             String metric = null;
 
-            Multimap<String, String> headers = msg.getRequestHeaders();
+            Multimap<String,String> headers = msg.getRequestHeaders();
             ProxiedEntityUtils.addProxyHeaders(headers, msg.getToken().getClientCert());
 
             if (msg instanceof CreateSubscription) {
@@ -83,14 +84,13 @@ public class WsRelayHandler extends SimpleChannelInboundHandler<SubscriptionRequ
 
                     @Override
                     public void operationComplete(ChannelFuture future) throws Exception {
-                        Map<String, WsClientHolder> metricToClientMap = wsClients.get(currentSubscriptionId);
+                        Map<String,WsClientHolder> metricToClientMap = wsClients.get(currentSubscriptionId);
 
                         if (metricToClientMap != null) {
                             synchronized (metricToClientMap) {
                                 // close all clients for this subscriptionId
-                                LOG.info("Channel closed, closing subscriptions for subscriptionId:%s",
+                                log.debug("Channel closed, closing subscriptions for subscriptionId:{}", currentSubscriptionId);
-                                        currentSubscriptionId);
+                                for (Map.Entry<String,WsClientHolder> entry : metricToClientMap.entrySet()) {
-                                for (Map.Entry<String, WsClientHolder> entry : metricToClientMap.entrySet()) {
                                     entry.getValue().close(wsClientPool);
                                 }
                                 wsClients.remove(currentSubscriptionId);
@@ -108,12 +108,10 @@ public class WsRelayHandler extends SimpleChannelInboundHandler<SubscriptionRequ
                 if (origContext == null) {
                     // send error because user never sent a CreateSubscription
                     // and we have nowhere to send the results
-                    LOG.info("ChannelHandlerContext not found for subscriptionId:%s - createSubscription not called?",
+                    log.info("ChannelHandlerContext not found for subscriptionId:{} - createSubscription not called?", subscriptionId);
-                            subscriptionId);
+                    sendErrorResponse(ctx, HttpResponseStatus.BAD_REQUEST, new IllegalArgumentException("Must call create first"));
-                    sendErrorResponse(ctx, HttpResponseStatus.BAD_REQUEST,
-                            new IllegalArgumentException("Must call create first"));
                 }
-                Map<String, WsClientHolder> metricToClientMap = wsClients.get(subscriptionId);
+                Map<String,WsClientHolder> metricToClientMap = wsClients.get(subscriptionId);
                 if (metricToClientMap == null) {
                     metricToClientMap = new HashMap<>();
                     wsClients.put(subscriptionId, metricToClientMap);
@@ -124,14 +122,13 @@ public class WsRelayHandler extends SimpleChannelInboundHandler<SubscriptionRequ
                     if (hostClientHolder == null) {
                         k = metricResolver.getHostPortKey(metric);
                         client = wsClientPool.borrowObject(k);
-                        client.open(new WsClientHandler(origContext, add.getToken(),
+                        client.open(new WsClientHandler(origContext, add.getToken(), (balancerWebsocketProperties.getTimeout() / 2)));
-                                (balancerConfig.getWebsocket().getTimeout() / 2)));
                         metricToClientMap.put(metric, new WsClientHolder(k, client));
                     } else {
                         client = hostClientHolder.getClient();
                     }
                 }
-                Map<String, String> tags = null;
+                Map<String,String> tags = null;
 
                 Long startTime = 0L;
                 Long endTime = 0L;
@@ -155,25 +152,25 @@ public class WsRelayHandler extends SimpleChannelInboundHandler<SubscriptionRequ
                 RemoveSubscription remove = (RemoveSubscription) msg;
                 metric = remove.getMetric();
                 subscriptionId = remove.getSubscriptionId();
-                Map<String, WsClientHolder> metricToClientMap = wsClients.get(subscriptionId);
+                Map<String,WsClientHolder> metricToClientMap = wsClients.get(subscriptionId);
                 if (metricToClientMap != null) {
                     synchronized (metricToClientMap) {
                         WsClientHolder hostClientHolder = metricToClientMap.get(metric);
                         if (hostClientHolder != null) {
                             hostClientHolder.getClient().removeSubscription(metric);
                         } else {
-                            LOG.info("client not found for subscriptionId:%s metric:%s", subscriptionId, metric);
+                            log.info("client not found for subscriptionId:{} metric:{}", subscriptionId, metric);
                         }
                     }
                 }
             } else if (msg instanceof CloseSubscription) {
                 CloseSubscription close = (CloseSubscription) msg;
                 subscriptionId = close.getSubscriptionId();
-                Map<String, WsClientHolder> metricToClientMap = wsClients.get(subscriptionId);
+                Map<String,WsClientHolder> metricToClientMap = wsClients.get(subscriptionId);
                 if (metricToClientMap != null) {
                     synchronized (metricToClientMap) {
                         // close all clients for this subscriptionId
-                        for (Map.Entry<String, WsClientHolder> entry : metricToClientMap.entrySet()) {
+                        for (Map.Entry<String,WsClientHolder> entry : metricToClientMap.entrySet()) {
                             entry.getValue().close(wsClientPool);
                         }
                     }
@@ -183,11 +180,11 @@ public class WsRelayHandler extends SimpleChannelInboundHandler<SubscriptionRequ
                 ctx.writeAndFlush(new CloseWebSocketFrame(1000, "Client requested close."));
             }
         } catch (ConnectException e1) {
-            LOG.error(e1.getMessage(), e1);
+            log.error(e1.getMessage(), e1);
             ChannelHandlerContext errorCtx = origContext == null ? ctx : origContext;
             sendErrorResponse(errorCtx, HttpResponseStatus.INTERNAL_SERVER_ERROR, e1);
         } catch (Exception e2) {
-            LOG.error(e2.getMessage(), e2);
+            log.error(e2.getMessage(), e2);
             ChannelHandlerContext errorCtx = origContext == null ? ctx : origContext;
             sendErrorResponse(errorCtx, HttpResponseStatus.INTERNAL_SERVER_ERROR, e2);
         }
@@ -201,7 +198,7 @@ public class WsRelayHandler extends SimpleChannelInboundHandler<SubscriptionRequ
             String json = mapper.writeValueAsString(te);
             ctx.writeAndFlush(new TextWebSocketFrame(json));
         } catch (JsonProcessingException e) {
-            LOG.error("Error serializing exception");
+            log.error("Error serializing exception");
         }
     }
 }

balancer/src/main/java/timely/balancer/resolver/MetricResolver.java

@@ -1,10 +0,0 @@
-package timely.balancer.resolver;
-
-import timely.balancer.connection.TimelyBalancedHost;
-
-public interface MetricResolver {
-
-    public TimelyBalancedHost getHostPortKeyIngest(String metric);
-
-    public TimelyBalancedHost getHostPortKey(String metric);
-}

balancer/src/main/resources/banner.txt

@@ -0,0 +1,11 @@
+===============================================================================
+  _______ _                _         ____        _
+ |__   __(_)              | |       |  _ \      | |
+    | |   _ _ __ ___   ___| |_   _  | |_) | __ _| | __ _ _ __   ___ ___ _ __
+    | |  | | '_ ` _ \ / _ \ | | | | |  _ < / _` | |/ _` | '_ \ / __/ _ \ '__|
+    | |  | | | | | | |  __/ | |_| | | |_) | (_| | | (_| | | | | (_|  __/ |
+    |_|  |_|_| |_| |_|\___|_|\__, | |____/ \__,_|_|\__,_|_| |_|\___\___|_|
+                              __/ |
+                             |___/
+===============================================================================
+TimelyBalancer ${application.formatted-version}

balancer/src/main/resources/config/bootstrap.yml

@@ -0,0 +1,6 @@
+spring:
+  application:
+    name: timely-balancer
+  config:
+    name: timely-balancer
+    location: ${CONF_DIR}/

balancer/src/main/spotbugs/excludes.xml

@@ -10,4 +10,12 @@
     <Method name="getBuf" />
     <Bug pattern="EI_EXPOSE_REP" />
   </Match>
+  <Match>
+    <!-- these are probably avoidable, but needs further triage to fix -->
+    <Bug pattern="EI_EXPOSE_REP" />
+  </Match>
+  <Match>
+    <!-- these are probably avoidable, but needs further triage to fix -->
+    <Bug pattern="EI_EXPOSE_REP2" />
+  </Match>
 </FindBugsFilter>

balancer/src/test/java/timely/balancer/configuration/TestBalancerConfiguration.java

@@ -0,0 +1,56 @@
+package timely.balancer.configuration;
+
+import javax.net.ssl.SSLContext;
+
+import org.apache.curator.framework.CuratorFramework;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+import io.netty.handler.ssl.SslContext;
+import timely.balancer.HealthChecker;
+import timely.balancer.MetricResolver;
+import timely.balancer.test.TestBalancer;
+import timely.balancer.test.TestHealthChecker;
+import timely.balancer.test.TestMetricResolver;
+import timely.common.component.AuthenticationService;
+import timely.common.configuration.CacheProperties;
+import timely.common.configuration.SecurityProperties;
+import timely.common.configuration.SslClientProperties;
+import timely.common.configuration.SslServerProperties;
+import timely.common.configuration.ZookeeperProperties;
+
+@Configuration
+@ComponentScan(basePackages = {"timely.balancer", "timely.common", "timely.test"})
+public class TestBalancerConfiguration {
+
+    @Bean
+    public TestBalancer balancer(ApplicationContext applicationContext, @Qualifier("nettySslContext") SslContext serverSslContext,
+                    @Qualifier("outboundJDKSslContext") SSLContext clientSSLContext, AuthenticationService authenticationService, MetricResolver metricResolver,
+                    BalancerProperties balancerProperties, ZookeeperProperties zookeeperProperties, SecurityProperties securityProperties,
+                    SslServerProperties sslServerProperties, SslClientProperties sslClientProperties, BalancerServerProperties balancerServerProperties,
+                    BalancerHttpProperties balancerHttpProperties, BalancerWebsocketProperties balancerWebsocketProperties) {
+        TestBalancer balancer = new TestBalancer(applicationContext, serverSslContext, clientSSLContext, authenticationService, metricResolver,
+                        balancerProperties, zookeeperProperties, securityProperties, sslServerProperties, sslClientProperties, balancerServerProperties,
+                        balancerHttpProperties, balancerWebsocketProperties);
+        balancer.start();
+        return balancer;
+    }
+
+    @Bean
+    public TestHealthChecker healthChecker(BalancerProperties balancerProperties, BalancerServerProperties balancerServerProperties) {
+        TestHealthChecker healthChecker = new TestHealthChecker(balancerProperties, balancerServerProperties);
+        healthChecker.start();
+        return healthChecker;
+    }
+
+    @Bean
+    public TestMetricResolver metricResolver(CuratorFramework curatorFramework, BalancerProperties balancerProperties, CacheProperties cacheProperties,
+                    HealthChecker healthChecker) throws Exception {
+        TestMetricResolver metricResolver = new TestMetricResolver(curatorFramework, balancerProperties, cacheProperties, healthChecker);
+        metricResolver.start();
+        return metricResolver;
+    }
+}

balancer/src/test/java/timely/balancer/configuration/TestZookeeperConfiguration.java

@@ -0,0 +1,80 @@
+package timely.balancer.configuration;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.nio.file.Files;
+import java.util.Properties;
+import java.util.concurrent.Executors;
+
+import org.apache.zookeeper.server.ServerConfig;
+import org.apache.zookeeper.server.ZooKeeperServerMain;
+import org.apache.zookeeper.server.quorum.QuorumPeerConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import timely.common.configuration.ZookeeperProperties;
+
+@Configuration
+@ConditionalOnProperty(name = "timely.in-memory-accumulo.enabled", havingValue = "true")
+public class TestZookeeperConfiguration {
+
+    private static final Logger log = LoggerFactory.getLogger(TestZookeeperConfiguration.class);
+    private static final int MAX_PORT = 100;
+    private int port;
+
+    private ZookeeperProperties zookeeperProperties;
+
+    @Bean(name = "ZooKeeperServerMain", destroyMethod = "close")
+    public ZooKeeperServerMain zooKeeperServerMain(ZookeeperProperties zookeeperProperties) throws Exception {
+        this.zookeeperProperties = zookeeperProperties;
+        this.port = getNextPort(2181);
+        this.zookeeperProperties.setServers(String.format("localhost:%d", port));
+
+        File tempDir;
+        try {
+            tempDir = Files.createTempDirectory("zookeeper_temp").toFile();
+            tempDir.deleteOnExit();
+        } catch (IOException e) {
+            throw new RuntimeException("Unable to create temp directory for mini accumulo cluster");
+        }
+
+        Properties properties = new Properties();
+        properties.put("dataDir", tempDir.getAbsolutePath() + "/data");
+        properties.put("clientPort", port);
+        properties.put("skipACL", "true");
+        properties.put("leaderServes", "yes");
+        properties.put("4lw.commands.whitelist", "*");
+        properties.put("admin.enableServer", "false");
+        QuorumPeerConfig quorumPeerConfig = new QuorumPeerConfig();
+        quorumPeerConfig.parseProperties(properties);
+
+        ZooKeeperServerMain zookeeper = new ZooKeeperServerMain();
+        final ServerConfig config = new ServerConfig();
+        config.readFrom(quorumPeerConfig);
+        Executors.newSingleThreadExecutor().submit(() -> {
+            try {
+                zookeeper.runFromConfig(config);
+            } catch (Exception e) {
+                log.error(e.getMessage(), e);
+            }
+        });
+        log.info("Started TestZookeeper on port {}", port);
+        return zookeeper;
+    }
+
+    private int getNextPort(int start) {
+        for (int port = start; port < start + MAX_PORT; ++port) {
+            try {
+                new ServerSocket(port).close();
+                return port;
+            } catch (IOException e) {
+
+            }
+        }
+        return -1;
+    }
+}

balancer/src/test/java/timely/balancer/integration/HTTPStrictTransportSecurityIT.java

@@ -0,0 +1,95 @@
+package timely.balancer.integration;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSocketFactory;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import timely.balancer.configuration.BalancerHttpProperties;
+import timely.netty.http.HttpStrictTransportSecurityHandler;
+import timely.test.IntegrationTest;
+import timely.test.TimelyTestRule;
+
+@Category(IntegrationTest.class)
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE)
+public class HTTPStrictTransportSecurityIT {
+
+    @Autowired
+    @Rule
+    public TimelyTestRule testRule;
+
+    @Autowired
+    private BalancerHttpProperties httpProperties;
+
+    @Autowired
+    protected SSLContext clientSslContext;
+
+    private String baseHttpUrl;
+    private String baseHttpsUrl;
+    private String HSTS_HEADER_VALUE;
+
+    @Before
+    public void setup() {
+        baseHttpUrl = "http://" + httpProperties.getHost() + ":" + httpProperties.getPort();
+        baseHttpsUrl = "https://" + httpProperties.getHost() + ":" + httpProperties.getPort();
+        HSTS_HEADER_VALUE = String.format("max-age=%d; includeSubDomains; preload", httpProperties.getStrictTransportMaxAge());
+    }
+
+    protected SSLSocketFactory getSSLSocketFactory() throws Exception {
+        return clientSslContext.getSocketFactory();
+    }
+
+    protected HttpsURLConnection getUrlConnection(URL url) throws Exception {
+        HttpsURLConnection.setDefaultSSLSocketFactory(getSSLSocketFactory());
+        HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
+        con.setHostnameVerifier((host, session) -> true);
+        return con;
+    }
+
+    @Test
+    public void testHttpRequest() throws Exception {
+        URL url = new URL(baseHttpUrl + "/api/metrics");
+        HttpURLConnection con = (HttpURLConnection) url.openConnection();
+        con.setRequestMethod("GET");
+        int responseCode = con.getResponseCode();
+        assertEquals(403, responseCode);
+        // should not have HSTS header on HTTP response
+        assertNull(con.getHeaderField(HttpStrictTransportSecurityHandler.HSTS_HEADER_NAME));
+        con.disconnect();
+    }
+
+    @Test
+    public void testHttpsRequestHSTS() throws Exception {
+        URL url = new URL(baseHttpsUrl + "/version");
+        HttpsURLConnection con = getUrlConnection(url);
+        int responseCode = con.getResponseCode();
+        assertEquals(200, responseCode);
+        assertEquals(HSTS_HEADER_VALUE, con.getHeaderField(HttpStrictTransportSecurityHandler.HSTS_HEADER_NAME));
+        con.disconnect();
+    }
+
+    @Test
+    public void testHttpsRequestNotFound() throws Exception {
+        URL url = new URL(baseHttpsUrl);
+        HttpsURLConnection con = getUrlConnection(url);
+        int responseCode = con.getResponseCode();
+        assertEquals(404, responseCode);
+        assertEquals(HSTS_HEADER_VALUE, con.getHeaderField(HttpStrictTransportSecurityHandler.HSTS_HEADER_NAME));
+        con.disconnect();
+    }
+}

balancer/src/test/java/timely/balancer/integration/MetricResolverIT.java

@@ -0,0 +1,138 @@
+package timely.balancer.integration;
+
+import static timely.Constants.SERVICE_DISCOVERY_PATH;
+
+import java.util.List;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.curator.framework.CuratorFramework;
+import org.apache.curator.framework.state.ConnectionState;
+import org.apache.curator.x.discovery.ServiceCache;
+import org.apache.curator.x.discovery.ServiceDiscovery;
+import org.apache.curator.x.discovery.ServiceDiscoveryBuilder;
+import org.apache.curator.x.discovery.ServiceInstance;
+import org.apache.curator.x.discovery.ServiceInstanceBuilder;
+import org.apache.curator.x.discovery.details.ServiceCacheListener;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.runner.RunWith;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import timely.ServerDetails;
+import timely.balancer.connection.TimelyBalancedHost;
+import timely.balancer.test.TestHealthChecker;
+import timely.balancer.test.TestMetricResolver;
+import timely.test.IntegrationTest;
+import timely.test.TimelyTestRule;
+
+@Category(IntegrationTest.class)
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE)
+public class MetricResolverIT {
+
+    private static final Logger log = LoggerFactory.getLogger(MetricResolverIT.class);
+
+    @Autowired
+    @Rule
+    public TimelyTestRule testRule;
+
+    @Autowired
+    private TestMetricResolver metricResolver;
+
+    @Autowired
+    private TestHealthChecker healthChecker;
+
+    @Autowired
+    private CuratorFramework curatorFramework;
+
+    private ServiceDiscovery<ServerDetails> discovery;
+    private ServiceCache<ServerDetails> serviceCache;
+
+    @Before
+    public void setup() throws Exception {
+        discovery = ServiceDiscoveryBuilder.builder(ServerDetails.class).client(curatorFramework).basePath(SERVICE_DISCOVERY_PATH).build();
+        discovery.start();
+        serviceCache = discovery.serviceCacheBuilder().name("timely-server").build();
+    }
+
+    @Test
+    public void ServiceRegistrationTest() {
+        LinkedBlockingQueue<List<ServiceInstance<ServerDetails>>> updateQueue = getServiceUpdateQueue(serviceCache);
+        registerService(curatorFramework, TimelyBalancedHost.of("host1", 5242, 5243, 5244, 5245, null));
+        registerService(curatorFramework, TimelyBalancedHost.of("host1", 5342, 5343, 5344, 5345, null));
+        registerService(curatorFramework, TimelyBalancedHost.of("host1", 5442, 5443, 5444, 5445, null));
+        registerService(curatorFramework, TimelyBalancedHost.of("host1", 5542, 5543, 5544, 5545, null));
+        try {
+            List<ServiceInstance<ServerDetails>> currentUpdate;
+            List<ServiceInstance<ServerDetails>> lastUpdate = null;
+            do {
+                currentUpdate = updateQueue.poll(200, TimeUnit.MILLISECONDS);
+                if (currentUpdate != null) {
+                    lastUpdate = currentUpdate;
+                }
+            } while (currentUpdate != null);
+            Assert.assertNotNull(lastUpdate);
+            Assert.assertEquals(4, lastUpdate.size());
+        } catch (InterruptedException e) {
+            Assert.fail("" + e.getMessage());
+        }
+        Assert.assertEquals(4, metricResolver.getServerList().size());
+        Assert.assertEquals(4, healthChecker.getTimelyHosts().size());
+    }
+
+    public void registerService(CuratorFramework curatorFramework, TimelyBalancedHost server) {
+        try {
+            ServerDetails payload = new ServerDetails();
+            payload.setHost(server.getHost());
+            payload.setTcpPort(server.getTcpPort());
+            payload.setHttpPort(server.getHttpPort());
+            payload.setWsPort(server.getWsPort());
+            payload.setUdpPort(server.getUdpPort());
+
+            ServiceInstanceBuilder<ServerDetails> builder = ServiceInstance.builder();
+            String serviceName = server.getHost() + ":" + server.getTcpPort();
+            ServiceInstance<ServerDetails> serviceInstance = builder.id(serviceName).name("timely-server").address(server.getHost()).port(server.getTcpPort())
+                            .payload(payload).build();
+
+            ServiceDiscovery<ServerDetails> discovery = ServiceDiscoveryBuilder.builder(ServerDetails.class).client(curatorFramework)
+                            .basePath(SERVICE_DISCOVERY_PATH).build();
+            discovery.start();
+            discovery.registerService(serviceInstance);
+        } catch (Exception e) {
+            log.error(e.getMessage());
+        }
+    }
+
+    private LinkedBlockingQueue<List<ServiceInstance<ServerDetails>>> getServiceUpdateQueue(ServiceCache<ServerDetails> serviceCache) {
+
+        LinkedBlockingQueue<List<ServiceInstance<ServerDetails>>> updates = new LinkedBlockingQueue<>();
+        try {
+
+            ServiceCacheListener listener = new ServiceCacheListener() {
+
+                @Override
+                public void stateChanged(CuratorFramework curatorFramework, ConnectionState connectionState) {
+
+                }
+
+                @Override
+                public void cacheChanged() {
+                    updates.add(serviceCache.getInstances());
+                }
+            };
+            serviceCache.addListener(listener);
+            serviceCache.start();
+        } catch (Exception e) {
+            log.error(e.getMessage(), e);
+        }
+        return updates;
+    }
+}

balancer/src/test/java/timely/balancer/test/TestBalancer.java

@@ -0,0 +1,36 @@
+package timely.balancer.test;
+
+import javax.net.ssl.SSLContext;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.ApplicationContext;
+
+import io.netty.handler.ssl.SslContext;
+import timely.balancer.Balancer;
+import timely.balancer.MetricResolver;
+import timely.balancer.configuration.BalancerHttpProperties;
+import timely.balancer.configuration.BalancerProperties;
+import timely.balancer.configuration.BalancerServerProperties;
+import timely.balancer.configuration.BalancerWebsocketProperties;
+import timely.common.component.AuthenticationService;
+import timely.common.configuration.SecurityProperties;
+import timely.common.configuration.SslClientProperties;
+import timely.common.configuration.SslServerProperties;
+import timely.common.configuration.ZookeeperProperties;
+
+public class TestBalancer extends Balancer {
+    private static final Logger log = LoggerFactory.getLogger(TestBalancer.class);
+
+    public TestBalancer(ApplicationContext applicationContext, SslContext serverSslContext, SSLContext clientSSLContext,
+                    AuthenticationService authenticationService, MetricResolver metricResolver, BalancerProperties balancerProperties,
+                    ZookeeperProperties zookeeperProperties, SecurityProperties securityProperties, SslServerProperties sslServerProperties,
+                    SslClientProperties sslClientProperties, BalancerServerProperties balancerServerProperties, BalancerHttpProperties balancerHttpProperties,
+                    BalancerWebsocketProperties balancerWebsocketProperties) {
+        super(applicationContext, serverSslContext, clientSSLContext, authenticationService, metricResolver, balancerProperties, zookeeperProperties,
+                        securityProperties, sslServerProperties, sslClientProperties, balancerServerProperties, balancerHttpProperties,
+                        balancerWebsocketProperties);
+        DEFAULT_EVENT_LOOP_THREADS = 1;
+        log.info("Starting TestBalancer");
+    }
+}

balancer/src/test/java/timely/balancer/test/TestHealthChecker.java

@@ -0,0 +1,19 @@
+package timely.balancer.test;
+
+import java.util.List;
+
+import timely.balancer.HealthChecker;
+import timely.balancer.configuration.BalancerProperties;
+import timely.balancer.configuration.BalancerServerProperties;
+import timely.balancer.connection.TimelyBalancedHost;
+
+public class TestHealthChecker extends HealthChecker {
+
+    public TestHealthChecker(BalancerProperties balancerProperties, BalancerServerProperties balancerServerProperties) {
+        super(balancerProperties, balancerServerProperties);
+    }
+
+    public List<TimelyBalancedHost> getTimelyHosts() {
+        return this.timelyHosts;
+    }
+}

balancer/src/test/java/timely/balancer/test/TestMetricResolver.java

@@ -0,0 +1,44 @@
+package timely.balancer.test;
+
+import java.util.List;
+
+import org.apache.curator.framework.CuratorFramework;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import timely.balancer.HealthChecker;
+import timely.balancer.MetricResolver;
+import timely.balancer.configuration.BalancerProperties;
+import timely.balancer.connection.TimelyBalancedHost;
+import timely.common.configuration.CacheProperties;
+
+public class TestMetricResolver extends MetricResolver {
+
+    private static final Logger log = LoggerFactory.getLogger(TestMetricResolver.class);
+
+    public TestMetricResolver(CuratorFramework curatorFramework, BalancerProperties balancerProperties, CacheProperties cacheProperties,
+                    HealthChecker healthChecker) throws Exception {
+        super(curatorFramework, balancerProperties, cacheProperties, healthChecker);
+    }
+
+    protected void createAssignmentFile() {
+        try {
+            log.info("Creating assignment file: " + balancerProperties.getAssignmentFile());
+            Configuration configuration = new Configuration();
+            FileSystem fs = FileSystem.get(configuration);
+            Path assignmentFile = new Path(balancerProperties.getAssignmentFile());
+            fs.setWriteChecksum(false);
+            fs.create(assignmentFile);
+            fs.deleteOnExit(assignmentFile);
+        } catch (Exception e) {
+            log.error(e.getMessage(), e);
+        }
+    }
+
+    public List<TimelyBalancedHost> getServerList() {
+        return this.serverList;
+    }
+}

balancer/src/test/java/timely/balancer/test/TestTimelyAuthenticationManager.java

@@ -0,0 +1,20 @@
+package timely.balancer.test;
+
+import java.util.Collections;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.annotation.Primary;
+import org.springframework.security.authentication.ProviderManager;
+import org.springframework.security.web.authentication.preauth.PreAuthenticatedAuthenticationProvider;
+import org.springframework.stereotype.Component;
+
+@Primary
+@Component
+public class TestTimelyAuthenticationManager extends ProviderManager {
+
+    @Autowired
+    public TestTimelyAuthenticationManager(@Qualifier("file") PreAuthenticatedAuthenticationProvider file) {
+        super(Collections.singletonList(file));
+    }
+}

balancer/src/test/resources/config/application.yml

@@ -0,0 +1,178 @@
+logging:
+  level:
+    ROOT: info
+    timely: debug
+    org.apache.zookeeper: error
+
+timely:
+  test: true
+  instance: 1
+  accumulo:
+    instance-name: default
+    username: root
+    password: secret
+  mini-accumulo:
+    enabled: true
+    rootAuths: A,B,C,D,E,F,G,H,I
+  zookeeper:
+    servers: localhost:0
+    timeout: 30s
+  security:
+    session-max-age: 86400
+    cache-expiration-minutes: 60
+    cache-refresh-minutes: 5
+    allow-anonymous-http-access: true
+    allow-anonymous-ws-access: true
+    authorized-users:
+      - subject-dn: cn=example.com
+        roles: G,H,I
+        auths: D,E,F
+        user-type: USER
+      - subject-dn: cn=test a. user, ou=example developers, o=example corp, c=us
+        issuer-dn: cn=example corp ca, o=example corp, c=us
+        roles: G,H,I
+        auths: A,B,C
+        user-type: USER
+    server-ssl:
+      key-store-type: PKCS12
+      key-store-file: classpath:ssl/testServer.p12
+      key-store-password: ChangeIt
+      trust-store-type: JKS
+      trust-store-file: classpath:ssl/ca.jks
+      trust-store-password: ChangeIt
+      use-generated-keypair: false
+      ignore-ssl-handshake-errors: true
+      use-openssl: true
+    client-ssl:
+      key-store-type: PKCS12
+      key-store-file: classpath:ssl/testUser.p12
+      key-store-password: ChangeIt
+      trust-store-type: JKS
+      trust-store-file: classpath:ssl/ca.jks
+      trust-store-password: ChangeIt
+  cache:
+    enabled: false
+    metric-age-off-hours:
+      default: 26
+    non-cached-metrics:
+  balancer:
+    check-server-health-interval: 10000
+    server-failures-before-down: 6
+    server-successes-before-up: 1
+    assignment-file: file://${java.io.tmpdir}/timely/balancer/assignments.csv
+    server:
+      ip: 127.0.0.1
+      tcp-base-port: 9242
+      tcp-buffer-size: 100
+      tcp-client-pool:
+        min-idle-per-key: 5
+        max-idle-per-key: 5
+        max-total-per-key: 5
+        max-total: -1
+        lifo: false
+        fairness: true
+        max-wait-millis: 60000
+        min-evictable-idle-time-millis: -1
+        evictor-shutdown-timeout-millis: 10000
+        soft-min-evictable-idle-time-millis: 300000
+        num-tests-per-eviction-run: 3
+        time-between-eviction-runs-millis: 30000
+        block-when-exhausted: true
+        remove-abandoned-on-borrow: false
+        remove-abandoned-on-maintenance: true
+        remove-abandoned-timeout-millis: 600000
+        remove-abandoned-logging: true
+        jmx-enabled: true
+        test-on-borrow: false
+        test-on-return: false
+      udp-base-port: 9245
+      udp-client-pool:
+        min-idle-per-key: 5
+        max-idle-per-key: 5
+        max-total-per-key: 5
+        max-total: -1
+        lifo: false
+        fairness: true
+        max-wait-millis: 60000
+        min-evictable-idle-time-millis: -1
+        evictor-shutdown-timeout-millis: 10000
+        soft-min-evictable-idle-time-millis: 300000
+        num-tests-per-eviction-run: 3
+        time-between-eviction-runs-millis: 30000
+        block-when-exhausted: true
+        remove-abandoned-on-borrow: false
+        remove-abandoned-on-maintenance: true
+        remove-abandoned-timeout-millis: 600000
+        remove-abandoned-logging: true
+        jmx-enabled: true
+        test-on-borrow: false
+        test-on-return: false
+    http:
+      host: localhost
+      ip: 127.0.0.1
+      base-port: 9243
+      redirect-path: /secure-me
+      strict-transport-max-age: 604800
+      connection-request-timeout: 5000
+      connect-timeout: 5000
+      socket-timeout: 300000
+      request-timeout: 300000
+      cors:
+        allow-any-origin: false
+        allow-null-origin: false
+        allow-credentials: true
+        allowed-origins:
+        allowed-methods: DELETE,GET,HEAD,OPTIONS,PUT,POST
+        allowed-headers: content-type
+      http-client-pool:
+        min-idle-per-key: 10
+        max-idle-per-key: 40
+        max-total-per-key: 40
+        max-total: -1
+        lifo: false
+        fairness: true
+        max-wait-millis: 60000
+        min-evictable-idle-time-millis: -1
+        evictor-shutdown-timeout-millis: 10000
+        soft-min-evictable-idle-time-millis: 300000
+        num-tests-per-eviction-run: 3
+        time-between-eviction-runs-millis: 30000
+        block-when-exhausted: true
+        remove-abandoned-on-borrow: false
+        remove-abandoned-on-maintenance: true
+        remove-abandoned-timeout-millis: 600000
+        remove-abandoned-logging: true
+        jmx-enabled: true
+        test-on-borrow: false
+        test-on-return: false
+    websocket:
+      ip: 127.0.0.1
+      base-port: 9244
+      timeout: 60
+      subscription-lag: 120
+      scanner-batch-size: 10000
+      flush-interval-seconds: 30
+      scanner-read-ahead: 1
+      subscription-batch-size: 5000
+      incoming-buffer-size: 50000000
+      ws-client-pool:
+        min-idle-per-key: 0
+        max-idle-per-key: 40
+        max-total-per-key: 40
+        max-total: -1
+        lifo: false
+        fairness: true
+        max-wait-millis: 60000
+        min-evictable-idle-time-millis: -1
+        evictor-shutdown-timeout-millis: 10000
+        soft-min-evictable-idle-time-millis: 300000
+        num-tests-per-eviction-run: 3
+        time-between-eviction-runs-millis: 30000
+        block-when-exhausted: true
+        remove-abandoned-on-borrow: false
+        remove-abandoned-on-maintenance: true
+        remove-abandoned-timeout-millis: 600000
+        remove-abandoned-logging: true
+        jmx-enabled: true
+        test-on-borrow: false
+        test-on-return: false

balancer/src/test/resources/config/bootstrap.yml

@@ -0,0 +1,3 @@
+spring:
+  application:
+    name: timely-balancer

balancer/src/test/resources/log4j2.yml

@@ -0,0 +1,24 @@
+Configuration:
+  status: warn
+  monitorInterval: 60
+
+  Properties:
+    Property:
+      - name: PID
+        value: "????"
+      - name: LOG_PATTERN
+        value: "%clr{%d{yyyy-MM-dd HH:mm:ss.SSS}}{faint} %clr{%5p} %clr{${sys:PID}}{magenta} %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n%wEx"
+
+  Appenders:
+    Console:
+      name: Console
+      target: SYSTEM_OUT
+      follow: true
+      PatternLayout:
+        pattern: "${LOG_PATTERN}"
+
+  Loggers:
+    Root:
+      level: warn
+      AppenderRef:
+        - ref: Console

balancer/src/test/resources/ssl/ca.cert

@@ -0,0 +1,23 @@
+Bag Attributes: <No Attributes>
+subject=/C=US/O=Example Corp/CN=EXAMPLE CORP CA
+issuer=/C=US/O=Example Corp/CN=EXAMPLE CORP CA
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

balancer/src/test/resources/ssl/testServer.cert

@@ -0,0 +1,51 @@
+Bag Attributes
+    localKeyID: 22 89 1C EA 4E FF 9A F6 11 1B E7 9B 5E 4F 59 B7 B1 0F AA FA 
+    friendlyName: example-server
+subject=/C=US/O=Example Corp/OU=Servers/CN=testserver.example.com
+issuer=/C=US/O=Example Corp/CN=EXAMPLE CORP CA
+-----BEGIN CERTIFICATE-----
+MIIDwjCCAqqgAwIBAgIUe6yBgkY1m/oXuPXA9j/c/7+w16UwDQYJKoZIhvcNAQEL
+BQAwPjELMAkGA1UEBhMCVVMxFTATBgNVBAoTDEV4YW1wbGUgQ29ycDEYMBYGA1UE
+AxMPRVhBTVBMRSBDT1JQIENBMCAXDTIzMDIwMTIzMTUwMFoYDzIxMjMwMTA4MjMx
+NTAwWjBXMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRXhhbXBsZSBDb3JwMRAwDgYD
+VQQLEwdTZXJ2ZXJzMR8wHQYDVQQDExZ0ZXN0c2VydmVyLmV4YW1wbGUuY29tMIIB
+IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmb1pEWg9a6ZChQULazK75ppc
+XScU5Ap29L70/5zcaOcbaBwqKhpKhdZCoZ1TD+Sdkk9kp7IlabCQjM2vVjknb6NY
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+6WSEBJMi
+-----END CERTIFICATE-----
+Bag Attributes: <No Attributes>
+subject=/C=US/O=Example Corp/CN=EXAMPLE CORP CA
+issuer=/C=US/O=Example Corp/CN=EXAMPLE CORP CA
+-----BEGIN CERTIFICATE-----
+MIIDTjCCAjagAwIBAgIURUj8l+ms/i9jeabIBBi19KxEhAgwDQYJKoZIhvcNAQEL
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+-----END CERTIFICATE-----

balancer/src/test/resources/ssl/testServer.key

@@ -0,0 +1,32 @@
+Bag Attributes
+    localKeyID: 22 89 1C EA 4E FF 9A F6 11 1B E7 9B 5E 4F 59 B7 B1 0F AA FA 
+    friendlyName: example-server
+Key Attributes: <No Attributes>
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCZvWkRaD1rpkKF
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+90VWrXaTwSjmP+yHMiPfaA0=
+-----END PRIVATE KEY-----

balancer/src/test/resources/ssl/testUser.cert

@@ -0,0 +1,50 @@
+Bag Attributes
+    localKeyID: 57 F6 9F DF B2 94 61 47 B0 B0 2E 3A F7 79 98 C8 15 5C 64 FA 
+    friendlyName: example-client
+subject=/C=US/O=Example Corp/OU=Example Developers/CN=Test A. User
+issuer=/C=US/O=Example Corp/CN=EXAMPLE CORP CA
+-----BEGIN CERTIFICATE-----
+MIIDmzCCAoOgAwIBAgIUFp4IuIaZ2XId7UNvzP6ZB9hChyUwDQYJKoZIhvcNAQEL
+BQAwPjELMAkGA1UEBhMCVVMxFTATBgNVBAoTDEV4YW1wbGUgQ29ycDEYMBYGA1UE
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+hqIvAjlGeDwdf+55EGjf
+-----END CERTIFICATE-----
+Bag Attributes: <No Attributes>
+subject=/C=US/O=Example Corp/CN=EXAMPLE CORP CA
+issuer=/C=US/O=Example Corp/CN=EXAMPLE CORP CA
+-----BEGIN CERTIFICATE-----
+MIIDTjCCAjagAwIBAgIURUj8l+ms/i9jeabIBBi19KxEhAgwDQYJKoZIhvcNAQEL
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+IVAFXf2brkrfIzwrY5kmjnEPJ8mjUyLepwSlOlMTBrehzQ==
+-----END CERTIFICATE-----

balancer/src/test/resources/ssl/testUser.key

@@ -0,0 +1,32 @@
+Bag Attributes
+    localKeyID: 57 F6 9F DF B2 94 61 47 B0 B0 2E 3A F7 79 98 C8 15 5C 64 FA 
+    friendlyName: example-client
+Key Attributes: <No Attributes>
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDDjHjdBJTA8WCk
+k9lQ9cD+mY5sueN2b/0IES02Is4N1Pbd7mVNAtx6lCZyvnOPjiZ0SMh7jF7iVhGF
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+xE/E7TKfLuE1CPzn7Rh/WZAxDqGNeQthk0qTbeBZ4/mHPKvt8V7c+N4vLjZ00uul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+-----END PRIVATE KEY-----

client/pom.xml

@@ -4,13 +4,13 @@
   <parent>
     <groupId>timely</groupId>
     <artifactId>timely</artifactId>
-    <version>1.2.8-SNAPSHOT</version>
+    <version>2.2.6-SNAPSHOT</version>
   </parent>
   <artifactId>timely-client</artifactId>
   <properties>
     <!-- PEP 440 compliant version gets substituted into src/main/python/template/setup.py -->
     <!-- use .dev0 instead of -SNAPSHOT -->
-    <python.client.version>1.2.8.dev0</python.client.version>
+    <python.client.version>2.2.6.dev0</python.client.version>
   </properties>
   <dependencies>
     <dependency>
@@ -53,6 +53,10 @@
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
     </dependency>
+    <dependency>
+      <groupId>timely</groupId>
+      <artifactId>timely-common</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-api</artifactId>
@@ -63,21 +67,18 @@
       <artifactId>log4j-core</artifactId>
       <scope>runtime</scope>
     </dependency>
+    <!--
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-slf4j-impl</artifactId>
       <scope>runtime</scope>
     </dependency>
+    -->
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>timely</groupId>
-      <artifactId>timely-common</artifactId>
-      <scope>test</scope>
-    </dependency>
   </dependencies>
   <build>
     <plugins>

client/src/main/java/timely/api/AddSubscription.java

@@ -7,7 +7,7 @@ public class AddSubscription extends SubscriptionRequest {
 
     private String operation = "add";
     private String metric = null;
-    private Optional<Map<String, String>> tags = Optional.empty();
+    private Optional<Map<String,String>> tags = Optional.empty();
     private Optional<Long> startTime = Optional.empty();
     private Optional<Long> endTime = Optional.empty();
     private Optional<Long> delayTime = Optional.empty();
@@ -20,7 +20,7 @@ public class AddSubscription extends SubscriptionRequest {
         return metric;
     }
 
-    public Optional<Map<String, String>> getTags() {
+    public Optional<Map<String,String>> getTags() {
         return tags;
     }
 
@@ -36,7 +36,7 @@ public class AddSubscription extends SubscriptionRequest {
         this.metric = metric;
     }
 
-    public void setTags(Optional<Map<String, String>> tags) {
+    public void setTags(Optional<Map<String,String>> tags) {
         this.tags = tags;
     }
 
@@ -71,9 +71,8 @@ public class AddSubscription extends SubscriptionRequest {
         }
         if (obj instanceof AddSubscription) {
             AddSubscription other = (AddSubscription) obj;
-            return (this.subscriptionId.equals(other.subscriptionId) && this.metric.equals(other.metric)
+            return (this.subscriptionId.equals(other.subscriptionId) && this.metric.equals(other.metric) && this.tags.equals(other.tags)
-                    && this.tags.equals(other.tags) && this.startTime.equals(other.startTime)
+                            && this.startTime.equals(other.startTime) && this.endTime.equals(other.endTime) && this.delayTime.equals(other.delayTime));
-                    && this.endTime.equals(other.endTime) && this.delayTime.equals(other.delayTime));
         } else {
             return false;
         }

client/src/main/java/timely/api/BasicAuthLogin.java

@@ -1,45 +0,0 @@
-package timely.api;
-
-public class BasicAuthLogin {
-
-    protected String username;
-    protected String password;
-
-    public String getUsername() {
-        return username;
-    }
-
-    public void setUsername(String user) {
-        this.username = user;
-    }
-
-    public String getPassword() {
-        return password;
-    }
-
-    public void setPassword(String password) {
-        this.password = password;
-    }
-
-    @Override
-    public int hashCode() {
-        return (username + password).hashCode();
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        if (null == obj) {
-            return false;
-        }
-        if (obj == this) {
-            return true;
-        }
-        if (obj instanceof BasicAuthLogin) {
-            BasicAuthLogin other = (BasicAuthLogin) obj;
-            return (this.username.equals(other.username) && this.password.equals(other.password));
-        } else {
-            return false;
-        }
-    }
-
-}

client/src/main/java/timely/api/VersionRequest.java

@@ -0,0 +1,10 @@
+package timely.api;
+
+public class VersionRequest {
+
+    private String operation = "version";
+
+    public String getOperation() {
+        return operation;
+    }
+}

client/src/main/java/timely/api/response/MetricResponse.java

@@ -5,9 +5,13 @@ import java.util.List;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 import org.apache.commons.lang3.builder.ToStringBuilder;
+
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
 import timely.model.Metric;
 import timely.model.Tag;
 
+@JsonPropertyOrder({"metric", "timestamp", "value", "tags", "subscriptionId", "complete"})
 public class MetricResponse {
 
     private String metric;

client/src/main/java/timely/client/http/HttpClient.java

@@ -15,8 +15,8 @@ import org.glassfish.tyrus.client.SslContextConfigurator;
 
 public class HttpClient {
 
-    public static SSLContext getSSLContext(String trustStoreFile, String trustStoreType, String trustStorePass,
+    public static SSLContext getSSLContext(String trustStoreFile, String trustStoreType, String trustStorePass, String keyStoreFile, String keyStoreType,
-            String keyStoreFile, String keyStoreType, String keyStorePass) {
+                    String keyStorePass) {
         SslContextConfigurator scc = new SslContextConfigurator();
         scc.setTrustStoreFile(trustStoreFile);
         scc.setTrustStoreType(trustStoreType);
@@ -31,12 +31,10 @@ public class HttpClient {
         return scc.createSSLContext();
     }
 
-    public static CloseableHttpClient get(String trustStoreFile, String trustStoreType, String trustStorePass,
+    public static CloseableHttpClient get(String trustStoreFile, String trustStoreType, String trustStorePass, String keyStoreFile, String keyStoreType,
-            String keyStoreFile, String keyStoreType, String keyStorePass, CookieStore cookieStore,
+                    String keyStorePass, CookieStore cookieStore, boolean hostVerificationEnabled) {
-            boolean hostVerificationEnabled) {
 
-        SSLContext ssl = getSSLContext(trustStoreFile, trustStoreType, trustStorePass, keyStoreFile, keyStoreType,
+        SSLContext ssl = getSSLContext(trustStoreFile, trustStoreType, trustStorePass, keyStoreFile, keyStoreType, keyStorePass);
-                keyStorePass);
         return get(ssl, cookieStore, hostVerificationEnabled);
     }
 
@@ -44,8 +42,7 @@ public class HttpClient {
         return get(ssl, cookieStore, hostVerificationEnabled, false);
     }
 
-    public static CloseableHttpClient get(SSLContext ssl, CookieStore cookieStore, boolean hostVerificationEnabled,
+    public static CloseableHttpClient get(SSLContext ssl, CookieStore cookieStore, boolean hostVerificationEnabled, boolean clientAuth) {
-            boolean clientAuth) {
         HostnameVerifier hostnameVerifier;
         if (hostVerificationEnabled) {
             hostnameVerifier = SSLConnectionSocketFactory.getDefaultHostnameVerifier();
@@ -55,16 +52,15 @@ public class HttpClient {
         RequestConfig defaultRequestConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.STANDARD).build();
         HttpClientBuilder builder;
         if (cookieStore == null) {
-            builder = HttpClients.custom().setSSLContext(ssl).disableCookieManagement()
+            builder = HttpClients.custom().setSSLContext(ssl).disableCookieManagement().setDefaultRequestConfig(defaultRequestConfig)
-                    .setDefaultRequestConfig(defaultRequestConfig).setSSLHostnameVerifier(hostnameVerifier);
+                            .setSSLHostnameVerifier(hostnameVerifier);
         } else {
-            builder = HttpClients.custom().setSSLContext(ssl).setDefaultCookieStore(cookieStore)
+            builder = HttpClients.custom().setSSLContext(ssl).setDefaultCookieStore(cookieStore).setDefaultRequestConfig(defaultRequestConfig)
-                    .setDefaultRequestConfig(defaultRequestConfig).setSSLHostnameVerifier(hostnameVerifier);
+                            .setSSLHostnameVerifier(hostnameVerifier);
         }
 
         if (clientAuth) {
-            SSLConnectionSocketFactory sslCSF = new SSLConnectionSocketFactory(ssl,
+            SSLConnectionSocketFactory sslCSF = new SSLConnectionSocketFactory(ssl, new String[] {"TLSv1.1", "TLSv1.2"}, null, hostnameVerifier);
-                    new String[] { "TLSv1.1", "TLSv1.2" }, null, hostnameVerifier);
             builder.setSSLSocketFactory(sslCSF);
         }
         return builder.build();

client/src/main/java/timely/client/tcp/TcpClient.java

@@ -4,31 +4,41 @@ import java.io.BufferedWriter;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 import java.net.Socket;
+import java.nio.charset.StandardCharsets;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 public class TcpClient implements AutoCloseable {
 
-    private static final Logger LOG = LoggerFactory.getLogger(TcpClient.class);
+    private static final Logger log = LoggerFactory.getLogger(TcpClient.class);
 
     private final String host;
     private final int port;
     private Socket sock = null;
     private BufferedWriter out = null;
     private long connectTime = 0L;
-    private long backoff = 2000;
+    private long INIT_BACKOFF = 1000;
-    private int bufferSize = -1;
+    private long MAX_BACKOFF = 60000;
+    private long backoff = INIT_BACKOFF;
+    private int bufferSize;
+    private long latency;
     private int writesSinceFlush = 0;
+    private long lastFlushTime = System.currentTimeMillis();
 
     public TcpClient(String hostname, int port) {
         this(hostname, port, -1);
     }
 
     public TcpClient(String hostname, int port, int bufferSize) {
+        this(hostname, port, bufferSize, -1);
+    }
+
+    public TcpClient(String hostname, int port, int bufferSize, long latency) {
         this.host = hostname;
         this.port = port;
         this.bufferSize = bufferSize;
+        this.latency = latency;
     }
 
     /**
@@ -53,20 +63,54 @@ public class TcpClient implements AutoCloseable {
         if (connect() != 0) {
             throw new IOException();
         }
-        out.write(metric);
+        try {
-        writesSinceFlush++;
+            out.write(metric);
-        if (bufferSize > 0 && writesSinceFlush >= bufferSize) {
+            writesSinceFlush++;
-            flush();
+            if (bufferSize > 0 && writesSinceFlush >= bufferSize) {
+                if (log.isTraceEnabled()) {
+                    log.trace(String.format("Flushing buffer writesSinceFlush >= %d", writesSinceFlush));
+                }
+                flush();
+            }
+            if (latency > 0 && (System.currentTimeMillis() - lastFlushTime) >= latency) {
+                if (log.isTraceEnabled()) {
+                    log.trace(String.format("Flushing buffer timeSinceFlush >= %d", latency));
+                }
+                flush();
+            }
+        } catch (IOException e) {
+            log.error(e.getMessage(), e);
+            reset();
+            throw e;
         }
     }
 
     public synchronized void flush() throws IOException {
         if (null != out) {
-            out.flush();
+            try {
-            writesSinceFlush = 0;
+                long start = System.currentTimeMillis();
+                out.flush();
+                lastFlushTime = System.currentTimeMillis();
+                if (log.isTraceEnabled()) {
+                    log.trace(String.format("Flushed %d metrics to socket in %d ms", writesSinceFlush, (lastFlushTime - start)));
+                }
+                writesSinceFlush = 0;
+            } catch (IOException e) {
+                log.error(String.format("Failed to flush %d metrics to socket", writesSinceFlush), e);
+                reset();
+                throw e;
+            }
         }
     }
 
+    private synchronized void reset() {
+        out = null;
+        sock = null;
+        backoff = INIT_BACKOFF;
+        writesSinceFlush = 0;
+        lastFlushTime = System.currentTimeMillis();
+    }
+
     /**
      * Closes the tcp connection to Timely
      *
@@ -74,8 +118,8 @@ public class TcpClient implements AutoCloseable {
      *             if an error occurs
      */
     @Override
-    public void close() throws IOException {
+    public synchronized void close() throws IOException {
-        LOG.trace("Shutting down connection to Timely at {}:{}", host, port);
+        log.info(String.format("Shutting down connection to Timely at %s:%d", host, port));
         if (null != sock) {
             try {
                 if (null != out) {
@@ -86,7 +130,7 @@ public class TcpClient implements AutoCloseable {
                 }
                 sock.close();
             } catch (IOException e) {
-                LOG.error("Error closing connection to Timely at " + host + ":" + port + ". Error: " + e.getMessage());
+                log.error(String.format("Error closing connection to Timely at %s:%d", host, port), e);
             } finally {
                 sock = null;
             }
@@ -96,22 +140,48 @@ public class TcpClient implements AutoCloseable {
     private synchronized int connect() {
         if (null == sock || !sock.isConnected()) {
             if (System.currentTimeMillis() > (connectTime + backoff)) {
+                OutputStreamWriter osw = null;
                 try {
                     connectTime = System.currentTimeMillis();
                     sock = new Socket(host, port);
-                    out = new BufferedWriter(new OutputStreamWriter(sock.getOutputStream()));
+                    osw = new OutputStreamWriter(sock.getOutputStream(), StandardCharsets.UTF_8);
-                    backoff = 2000;
+                    out = new BufferedWriter(osw);
-                    LOG.trace("Connected to Timely at {}:{}", host, port);
+                    backoff = INIT_BACKOFF;
-                } catch (IOException e) {
+                    log.info(String.format("Connected to Timely at %s:%d", host, port));
-                    LOG.error("Error connecting to Timely at {}:" + host + ":" + port + ". Error: " + e.getMessage());
+                } catch (Exception e) {
-                    backoff = backoff * 2;
+                    log.error(String.format("Error connecting to Timely at %s:%d", host, port), e);
-                    sock = null;
+                    if (sock != null) {
-                    out = null;
+                        try {
-                    LOG.info("Will retry connection in {} ms.", backoff);
+                            sock.close();
+                        } catch (IOException e1) {
+                            log.error(e1.getMessage());
+                        } finally {
+                            sock = null;
+                        }
+                    }
+                    if (osw != null) {
+                        try {
+                            osw.close();
+                        } catch (IOException e1) {
+                            log.error(e1.getMessage());
+                        }
+                    }
+                    if (out != null) {
+                        try {
+                            out.close();
+                        } catch (IOException e1) {
+                            log.error(e1.getMessage());
+                        } finally {
+                            out = null;
+                        }
+                    }
+                    backoff = Math.min(MAX_BACKOFF, backoff * 2);
+                    if (log.isTraceEnabled()) {
+                        log.trace(String.format("Will retry connection in %d ms", backoff));
+                    }
                     return -1;
                 }
             } else {
-                LOG.warn("Not writing to Timely, waiting to reconnect");
                 return -1;
             }
         }
@@ -121,4 +191,22 @@ public class TcpClient implements AutoCloseable {
     public long getConnectTime() {
         return connectTime;
     }
+
+    public int getWritesSinceFlush() {
+        return writesSinceFlush;
+    }
+
+    public long getTimeSinceFlush() {
+        return System.currentTimeMillis() - lastFlushTime;
+    }
+
+    public synchronized boolean isConnected() {
+        boolean isConnected = (null != sock && sock.isConnected());
+        if (isConnected) {
+            return true;
+        } else {
+            int status = connect();
+            return status == 0;
+        }
+    }
 }

client/src/main/java/timely/client/udp/UdpClient.java

@@ -12,7 +12,7 @@ import org.slf4j.LoggerFactory;
 
 public class UdpClient implements AutoCloseable {
 
-    private static final Logger LOG = LoggerFactory.getLogger(UdpClient.class);
+    private static final Logger log = LoggerFactory.getLogger(UdpClient.class);
 
     private final String host;
     private final int port;
@@ -38,12 +38,11 @@ public class UdpClient implements AutoCloseable {
             throw new IllegalStateException("Must call open first");
         }
         this.packet.setData(metric.getBytes(UTF_8));
-        LOG.info("writing '" + metric + "' to " + this.host + ":" + this.port);
+        log.info("writing '" + metric + "' to " + this.host + ":" + this.port);
         this.sock.send(packet);
     }
 
-    public void flush() throws IOException {
+    public void flush() throws IOException {}
-    }
 
     public void close() throws IOException {
         if (null != sock) {

client/src/main/java/timely/client/websocket/ClientHandler.java

@@ -6,7 +6,6 @@ import java.util.Map;
 import javax.websocket.CloseReason;
 import javax.websocket.Endpoint;
 import javax.websocket.EndpointConfig;
-import javax.websocket.MessageHandler;
 import javax.websocket.Session;
 
 import org.slf4j.Logger;
@@ -14,30 +13,25 @@ import org.slf4j.LoggerFactory;
 
 public abstract class ClientHandler extends Endpoint {
 
-    private final static Logger LOG = LoggerFactory.getLogger(ClientHandler.class);
+    private final static Logger log = LoggerFactory.getLogger(ClientHandler.class);
 
     @Override
     public void onOpen(Session session, EndpointConfig config) {
-        LOG.info("Websocket session {} opened.", session.getId());
+        log.info("Websocket session {} opened.", session.getId());
-        session.addMessageHandler(new MessageHandler.Whole<String>() {
+        session.addMessageHandler(String.class, message -> {
-
+            log.info("Message received on Websocket session {}: {}", session.getId(), message);
-            @Override
-            public void onMessage(String message) {
-                LOG.info("Message received on Websocket session {}: {}", session.getId(), message);
-            }
         });
     }
 
     @Override
     public void onClose(Session session, CloseReason reason) {
-        LOG.info("Websocket session {} closed.", session.getId());
+        log.info("Websocket session {} closed.", session.getId());
     }
 
     @Override
     public void onError(Session session, Throwable error) {
-        LOG.error("Error occurred on Websocket session" + session.getId(), error);
+        log.error("Error occurred on Websocket session" + session.getId(), error);
     }
 
-    public void beforeRequest(Map<String, List<String>> headers) {
+    public void beforeRequest(Map<String,List<String>> headers) {}
-    }
 }

client/src/main/java/timely/client/websocket/TimelyEndpointConfig.java

@@ -36,7 +36,7 @@ public class TimelyEndpointConfig implements ClientEndpointConfig {
     }
 
     @Override
-    public Map<String, Object> getUserProperties() {
+    public Map<String,Object> getUserProperties() {
         return Collections.emptyMap();
     }
 
@@ -55,7 +55,7 @@ public class TimelyEndpointConfig implements ClientEndpointConfig {
         return new Configurator() {
 
             @Override
-            public void beforeRequest(Map<String, List<String>> headers) {
+            public void beforeRequest(Map<String,List<String>> headers) {
                 super.beforeRequest(headers);
                 if (null != sessionCookie) {
                     headers.put("Cookie", Collections.singletonList(sessionCookie));

client/src/main/java/timely/client/websocket/WebSocketClient.java

@@ -10,17 +10,13 @@ import javax.net.ssl.SSLContext;
 import javax.websocket.DeploymentException;
 import javax.websocket.Session;
 
-import com.google.common.base.Preconditions;
-import org.apache.commons.lang3.StringUtils;
 import org.apache.http.HttpResponse;
 import org.apache.http.HttpStatus;
 import org.apache.http.client.HttpResponseException;
 import org.apache.http.client.methods.HttpGet;
-import org.apache.http.client.methods.HttpPost;
 import org.apache.http.client.methods.HttpRequestBase;
 import org.apache.http.client.utils.HttpClientUtils;
 import org.apache.http.cookie.Cookie;
-import org.apache.http.entity.StringEntity;
 import org.apache.http.impl.client.BasicCookieStore;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.glassfish.tyrus.client.ClientManager;
@@ -28,21 +24,20 @@ import org.glassfish.tyrus.client.ClientProperties;
 import org.glassfish.tyrus.client.SslEngineConfigurator;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import timely.api.BasicAuthLogin;
+
+import com.google.common.base.Preconditions;
+
 import timely.client.http.HttpClient;
-import timely.serialize.JsonSerializer;
 
 public class WebSocketClient implements AutoCloseable {
 
-    private static final Logger LOG = LoggerFactory.getLogger(WebSocketClient.class);
+    private static final Logger log = LoggerFactory.getLogger(WebSocketClient.class);
 
     private final String timelyHostname;
     private final int timelyHttpsPort;
     private final int timelyWssPort;
     private final boolean doLogin;
     private final boolean clientAuth;
-    private final String timelyUsername;
-    private final String timelyPassword;
     private final boolean hostVerificationEnabled;
     private final int bufferSize;
     private final SSLContext ssl;
@@ -51,39 +46,27 @@ public class WebSocketClient implements AutoCloseable {
     protected Session session = null;
     protected volatile boolean closed = true;
 
-    protected WebSocketClient(SSLContext ssl, String timelyHostname, int timelyHttpsPort, int timelyWssPort,
+    protected WebSocketClient(SSLContext ssl, String timelyHostname, int timelyHttpsPort, int timelyWssPort, boolean clientAuth, boolean doLogin,
-            boolean clientAuth, boolean doLogin, String timelyUsername, String timelyPassword,
+                    boolean hostVerificationEnabled, int bufferSize) {
-            boolean hostVerificationEnabled, int bufferSize) {
         this.ssl = ssl;
         this.timelyHostname = timelyHostname;
         this.timelyHttpsPort = timelyHttpsPort;
         this.timelyWssPort = timelyWssPort;
         this.doLogin = doLogin;
         this.clientAuth = clientAuth;
-        this.timelyUsername = timelyUsername;
-        this.timelyPassword = timelyPassword;
         this.hostVerificationEnabled = hostVerificationEnabled;
         this.bufferSize = bufferSize;
 
         Preconditions.checkNotNull(timelyHostname, "%s must be supplied", "Timely host name");
         Preconditions.checkNotNull(timelyHttpsPort, "%s must be supplied", "Timely HTTPS port");
         Preconditions.checkNotNull(timelyWssPort, "%s must be supplied", "Timely WSS port");
-
-        if (doLogin && !clientAuth) {
-            if ((StringUtils.isEmpty(timelyUsername) && !StringUtils.isEmpty(timelyPassword)
-                    || (!StringUtils.isEmpty(timelyUsername) && StringUtils.isEmpty(timelyPassword)))) {
-                throw new IllegalArgumentException("Both Timely username and password must be empty or non-empty");
-            }
-        }
     }
 
-    protected WebSocketClient(String timelyHostname, int timelyHttpsPort, int timelyWssPort, boolean clientAuth,
+    protected WebSocketClient(String timelyHostname, int timelyHttpsPort, int timelyWssPort, boolean clientAuth, boolean doLogin, String keyStoreFile,
-            boolean doLogin, String timelyUsername, String timelyPassword, String keyStoreFile, String keyStoreType,
+                    String keyStoreType, String keyStorePass, String trustStoreFile, String trustStoreType, String trustStorePass,
-            String keyStorePass, String trustStoreFile, String trustStoreType, String trustStorePass,
+                    boolean hostVerificationEnabled, int bufferSize) {
-            boolean hostVerificationEnabled, int bufferSize) {
+        this(HttpClient.getSSLContext(trustStoreFile, trustStoreType, trustStorePass, keyStoreFile, keyStoreType, keyStorePass), timelyHostname,
-        this(HttpClient.getSSLContext(trustStoreFile, trustStoreType, trustStorePass, keyStoreFile, keyStoreType,
+                        timelyHttpsPort, timelyWssPort, clientAuth, doLogin, hostVerificationEnabled, bufferSize);
-                keyStorePass), timelyHostname, timelyHttpsPort, timelyWssPort, clientAuth, doLogin, timelyUsername,
-                timelyPassword, hostVerificationEnabled, bufferSize);
     }
 
     public void open(ClientHandler clientEndpoint) throws IOException, DeploymentException, URISyntaxException {
@@ -93,30 +76,16 @@ public class WebSocketClient implements AutoCloseable {
             try (CloseableHttpClient client = HttpClient.get(ssl, cookieJar, hostVerificationEnabled, clientAuth)) {
 
                 String target = "https://" + timelyHostname + ":" + timelyHttpsPort + "/login";
-
                 HttpRequestBase request = null;
-                if (StringUtils.isEmpty(timelyUsername)) {
+                // HTTP GET to /login to use certificate based login
-                    // HTTP GET to /login to use certificate based login
+                request = new HttpGet(target);
-                    request = new HttpGet(target);
+                log.trace("Performing client certificate login");
-                    LOG.trace("Performing client certificate login");
-                } else {
-                    // HTTP POST to /login to use username/password
-                    BasicAuthLogin login = new BasicAuthLogin();
-                    login.setUsername(timelyUsername);
-                    login.setPassword(timelyPassword);
-                    String payload = JsonSerializer.getObjectMapper().writeValueAsString(login);
-                    HttpPost post = new HttpPost(target);
-                    post.setEntity(new StringEntity(payload));
-                    request = post;
-                    LOG.trace("Performing BasicAuth login");
-                }
 
                 HttpResponse response = null;
                 try {
                     response = client.execute(request);
                     if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
-                        throw new HttpResponseException(response.getStatusLine().getStatusCode(),
+                        throw new HttpResponseException(response.getStatusLine().getStatusCode(), response.getStatusLine().getReasonPhrase());
-                                response.getStatusLine().getReasonPhrase());
                     }
                     for (Cookie c : cookieJar.getCookies()) {
                         if (c.getName().equals("TSESSIONID")) {
@@ -125,8 +94,7 @@ public class WebSocketClient implements AutoCloseable {
                         }
                     }
                     if (null == sessionCookie) {
-                        throw new IllegalStateException(
+                        throw new IllegalStateException("Unable to find TSESSIONID cookie header in Timely login response");
-                                "Unable to find TSESSIONID cookie header in Timely login response");
                     }
                 } finally {
                     HttpClientUtils.closeQuietly(response);
@@ -142,15 +110,14 @@ public class WebSocketClient implements AutoCloseable {
         webSocketClient.getProperties().put(ClientProperties.SSL_ENGINE_CONFIGURATOR, sslEngine);
         webSocketClient.getProperties().put(ClientProperties.INCOMING_BUFFER_SIZE, bufferSize);
         String wssPath = "wss://" + timelyHostname + ":" + timelyWssPort + "/websocket";
-        session = webSocketClient.connectToServer(clientEndpoint,
+        session = webSocketClient.connectToServer(clientEndpoint, new TimelyEndpointConfig(clientEndpoint, sessionCookie), new URI(wssPath));
-                new TimelyEndpointConfig(clientEndpoint, sessionCookie), new URI(wssPath));
 
         final ByteBuffer pingData = ByteBuffer.allocate(0);
         webSocketClient.getScheduledExecutorService().scheduleAtFixedRate(() -> {
             try {
                 session.getBasicRemote().sendPing(pingData);
             } catch (Exception e) {
-                LOG.error("Error sending ping", e);
+                log.error("Error sending ping", e);
             }
         }, 30, 60, TimeUnit.SECONDS);
         closed = false;

client/src/main/java/timely/client/websocket/subscription/WebSocketSubscriptionClient.java

@@ -13,37 +13,35 @@ import javax.websocket.DeploymentException;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
 import timely.api.AddSubscription;
 import timely.api.CloseSubscription;
 import timely.api.CreateSubscription;
 import timely.api.RemoveSubscription;
+import timely.api.VersionRequest;
 import timely.client.websocket.ClientHandler;
 import timely.client.websocket.WebSocketClient;
 import timely.serialize.JsonSerializer;
 
 public class WebSocketSubscriptionClient extends WebSocketClient {
 
-    private static final Logger LOG = LoggerFactory.getLogger(WebSocketSubscriptionClient.class);
+    private static final Logger log = LoggerFactory.getLogger(WebSocketSubscriptionClient.class);
     private final String subscriptionId;
 
-    public WebSocketSubscriptionClient(SSLContext ssl, String timelyHostname, int timelyHttpsPort, int timelyWssPort,
+    public WebSocketSubscriptionClient(SSLContext ssl, String timelyHostname, int timelyHttpsPort, int timelyWssPort, boolean clientAuth, boolean doLogin,
-            boolean clientAuth, boolean doLogin, String timelyUsername, String timelyPassword,
+                    boolean hostVerificationEnabled, int bufferSize) {
-            boolean hostVerificationEnabled, int bufferSize) {
+        super(ssl, timelyHostname, timelyHttpsPort, timelyWssPort, clientAuth, doLogin, hostVerificationEnabled, bufferSize);
-        super(ssl, timelyHostname, timelyHttpsPort, timelyWssPort, clientAuth, doLogin, timelyUsername, timelyPassword,
-                hostVerificationEnabled, bufferSize);
         subscriptionId = UUID.randomUUID().toString();
-        LOG.trace("Created WebSocketClient with subscriptionId {}", this.subscriptionId);
+        log.trace("Created WebSocketClient with subscriptionId {}", this.subscriptionId);
     }
 
-    public WebSocketSubscriptionClient(String timelyHostname, int timelyHttpsPort, int timelyWssPort,
+    public WebSocketSubscriptionClient(String timelyHostname, int timelyHttpsPort, int timelyWssPort, boolean clientAuth, boolean doLogin, String keyStoreFile,
-            boolean clientAuth, boolean doLogin, String timelyUsername, String timelyPassword, String keyStoreFile,
+                    String keyStoreType, String keyStorePass, String trustStoreFile, String trustStoreType, String trustStorePass,
-            String keyStoreType, String keyStorePass, String trustStoreFile, String trustStoreType,
+                    boolean hostVerificationEnabled, int bufferSize) {
-            String trustStorePass, boolean hostVerificationEnabled, int bufferSize) {
+        super(timelyHostname, timelyHttpsPort, timelyWssPort, clientAuth, doLogin, keyStoreFile, keyStoreType, keyStorePass, trustStoreFile, trustStoreType,
-        super(timelyHostname, timelyHttpsPort, timelyWssPort, clientAuth, doLogin, timelyUsername, timelyPassword,
+                        trustStorePass, hostVerificationEnabled, bufferSize);
-                keyStoreFile, keyStoreType, keyStorePass, trustStoreFile, trustStoreType, trustStorePass,
-                hostVerificationEnabled, bufferSize);
         subscriptionId = UUID.randomUUID().toString();
-        LOG.trace("Created WebSocketClient with subscriptionId {}", this.subscriptionId);
+        log.trace("Created WebSocketClient with subscriptionId {}", this.subscriptionId);
     }
 
     @Override
@@ -63,14 +61,13 @@ public class WebSocketSubscriptionClient extends WebSocketClient {
                 session.getBasicRemote().sendText(JsonSerializer.getObjectMapper().writeValueAsString(close));
                 session.close(new CloseReason(CloseReason.CloseCodes.NORMAL_CLOSURE, "Client called close."));
             } catch (Exception e) {
-                LOG.info("Unable to send close message to server: {}", e.getMessage());
+                log.info("Unable to send close message to server: {}", e.getMessage());
             }
         }
         super.close();
     }
 
-    public Future<Void> addSubscription(String metric, Map<String, String> tags, long startTime, long endTime,
+    public Future<Void> addSubscription(String metric, Map<String,String> tags, long startTime, long endTime, long delayTime) throws IOException {
-            long delayTime) throws IOException {
         AddSubscription add = new AddSubscription();
         add.setSubscriptionId(subscriptionId);
         add.setMetric(metric);
@@ -88,4 +85,8 @@ public class WebSocketSubscriptionClient extends WebSocketClient {
         return session.getAsyncRemote().sendText(JsonSerializer.getObjectMapper().writeValueAsString(remove));
     }
 
+    public Future<Void> requestVersion() throws Exception {
+        VersionRequest version = new VersionRequest();
+        return session.getAsyncRemote().sendText(JsonSerializer.getObjectMapper().writeValueAsString(version));
+    }
 }

client/src/main/spotbugs/excludes.xml

@@ -1,13 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <FindBugsFilter>
   <Match>
-    <Bug pattern="DM_DEFAULT_ENCODING"/>
+    <!-- these are probably avoidable, but needs further triage to fix -->
-    <Method name="connect" />
+    <Bug pattern="MS_EXPOSE_REP" />
-    <Class name="timely.client.tcp.TcpClient"/>
   </Match>
   <Match>
-    <!-- Must ignore these everywhere, because of a javac byte code generation bug -->
+    <!-- these are probably avoidable, but needs further triage to fix -->
-    <!-- https://github.com/spotbugs/spotbugs/issues/756 -->
+    <Bug pattern="EI_EXPOSE_REP" />
-    <Bug pattern="RCN_REDUNDANT_NULLCHECK_WOULD_HAVE_BEEN_A_NPE" />
+  </Match>
+  <Match>
+    <!-- these are probably avoidable, but needs further triage to fix -->
+    <Bug pattern="EI_EXPOSE_REP2" />
   </Match>
 </FindBugsFilter>

client/src/test/java/timely/api/SerializationTest.java

@@ -1,22 +1,16 @@
 package timely.api;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.Assert;
 import org.junit.Test;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
 import timely.serialize.JsonSerializer;
 
 public class SerializationTest {
 
     private ObjectMapper mapper = JsonSerializer.getObjectMapper();
 
-    @Test
-    public void testBasicAuth() throws Exception {
-        BasicAuthLogin login = new BasicAuthLogin();
-        login.setUsername("test");
-        login.setPassword("pass");
-        testSerialization(login);
-    }
-
     @Test
     public void testCreateSubscription() throws Exception {
         CreateSubscription create = new CreateSubscription();

client/src/test/java/timely/model/MetricTest.java

@@ -6,9 +6,10 @@ import static org.junit.Assert.assertTrue;
 
 import java.io.IOException;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.Test;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+
 /**
  *
  *
@@ -30,8 +31,7 @@ public class MetricTest {
         Metric m4 = Metric.newBuilder().name("m4").tag("t2", "v2").tag("t1", "v1").value(1, 0.0).build();
         assertFalse(m1.equals(m4));
 
-        Metric m5 = Metric.newBuilder().name("m1").tag("t3", "v3").tag("t2", "v2").tag("t1", "v1").value(1, 0.0)
+        Metric m5 = Metric.newBuilder().name("m1").tag("t3", "v3").tag("t2", "v2").tag("t1", "v1").value(1, 0.0).build();
-                .build();
         assertFalse(m1.equals(m5));
 
         Metric m6 = Metric.newBuilder().name("m1").tag("t2", "v2").tag("t1", "v1").value(2, 0.0).build();

client/src/test/java/timely/model/parse/MetricParserTest.java

@@ -5,6 +5,7 @@ import java.util.List;
 
 import org.junit.Assert;
 import org.junit.Test;
+
 import timely.model.Metric;
 import timely.model.Tag;