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Streaming Response Broken: Cross-use the Question Classification component. #10759

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opened 2026-02-21 18:50:47 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 18:50:47 -05:00
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Originally created by @zhudongwork on GitHub (Mar 13, 2025).

Originally assigned to: @Nov1c444 on GitHub.

Self Checks

  • This is only for bug report, if you would like to ask a question, please head to Discussions.
  • I have searched for existing issues search for existing issues, including closed ones.
  • I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
  • [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:）
  • Please do not modify this template :) and fill in all the required fields.

Dify version

0.15.3

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

Problem Description

When I use two Question Classification components and perform cross-aggregation, streaming output is not possible.

The same DSL file can achieve normal streaming output in version 0.10.2.

Test case

input

1 what's AI

screen shoot

Image

Image

DSL file

app:
  description: ''
  icon: https://zswl-nav.oss-cn-hangzhou.aliyuncs.com/big-dipper/agent_app_icon.svg
  icon_background: ''
  mode: advanced-chat
  name: 分类测试
  use_icon_as_answer_icon: false
kind: app
version: 0.1.5
workflow:
  conversation_variables: []
  environment_variables: []
  features:
    file_upload:
      allowed_file_extensions:
      - .JPG
      - .JPEG
      - .PNG
      - .GIF
      - .WEBP
      - .SVG
      allowed_file_types:
      - image
      allowed_file_upload_methods:
      - local_file
      - remote_url
      enabled: false
      fileUploadConfig:
        audio_file_size_limit: 50
        batch_count_limit: 5
        file_size_limit: 15
        image_file_size_limit: 10
        video_file_size_limit: 100
        workflow_file_upload_limit: 10
      image:
        enabled: false
        number_limits: 3
        transfer_methods:
        - local_file
        - remote_url
      number_limits: 3
    opening_statement: ''
    retriever_resource:
      enabled: true
    sensitive_word_avoidance:
      enabled: false
    speech_to_text:
      enabled: false
    suggested_questions: []
    suggested_questions_after_answer:
      enabled: false
    text_to_speech:
      enabled: false
      language: ''
      voice: ''
  graph:
    edges:
    - data:
        isInIteration: false
        sourceType: start
        targetType: if-else
      id: 1741752284478-source-1741752315248-target
      source: '1741752284478'
      sourceHandle: source
      target: '1741752315248'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: variable-aggregator
        targetType: llm
      id: 1741752409392-source-1741752476950-target
      source: '1741752409392'
      sourceHandle: source
      target: '1741752476950'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: llm
        targetType: answer
      id: 1741752476950-source-1741752500566-target
      source: '1741752476950'
      sourceHandle: source
      target: '1741752500566'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: variable-aggregator
        targetType: llm
      id: 1741752422390-source-17417525115180-target
      source: '1741752422390'
      sourceHandle: source
      target: '17417525115180'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: llm
        targetType: answer
      id: 17417525115180-source-1741752521689-target
      source: '17417525115180'
      sourceHandle: source
      target: '1741752521689'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: if-else
        targetType: question-classifier
      id: 1741752315248-true-1741753169252-target
      source: '1741752315248'
      sourceHandle: 'true'
      target: '1741753169252'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: question-classifier
        targetType: variable-aggregator
      id: 1741753169252-1-1741752409392-target
      source: '1741753169252'
      sourceHandle: '1'
      target: '1741752409392'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: if-else
        targetType: question-classifier
      id: 1741752315248-false-1741753191614-target
      source: '1741752315248'
      sourceHandle: 'false'
      target: '1741753191614'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: question-classifier
        targetType: variable-aggregator
      id: 1741753169252-2-1741752422390-target
      source: '1741753169252'
      sourceHandle: '2'
      target: '1741752422390'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: question-classifier
        targetType: variable-aggregator
      id: 1741753191614-2-1741752422390-target
      source: '1741753191614'
      sourceHandle: '2'
      target: '1741752422390'
      targetHandle: target
      type: custom
      zIndex: 0
    - data:
        isInIteration: false
        sourceType: question-classifier
        targetType: variable-aggregator
      id: 1741753191614-1-1741752409392-target
      source: '1741753191614'
      sourceHandle: '1'
      target: '1741752409392'
      targetHandle: target
      type: custom
      zIndex: 0
    nodes:
    - data:
        desc: ''
        selected: false
        title: 开始
        type: start
        variables: []
      height: 53
      id: '1741752284478'
      position:
        x: -129.38320907155503
        y: 234.43171572743677
      positionAbsolute:
        x: -129.38320907155503
        y: 234.43171572743677
      selected: true
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    - data:
        cases:
        - case_id: 'true'
          conditions:
          - comparison_operator: contains
            id: fbc8fda1-1261-419c-a35e-f683f0852888
            value: '1'
            varType: string
            variable_selector:
            - sys
            - query
          id: 'true'
          logical_operator: and
        desc: ''
        selected: false
        title: 条件分支
        type: if-else
      height: 125
      id: '1741752315248'
      position:
        x: 249.47152014309233
        y: 234.43171572743677
      positionAbsolute:
        x: 249.47152014309233
        y: 234.43171572743677
      selected: false
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    - data:
        desc: ''
        output_type: string
        selected: false
        title: 变量聚合器
        type: variable-aggregator
        variables:
        - - sys
          - query
      height: 108
      id: '1741752409392'
      position:
        x: 1119.3936288724205
        y: 50.819810969560464
      positionAbsolute:
        x: 1119.3936288724205
        y: 50.819810969560464
      selected: false
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    - data:
        desc: ''
        output_type: string
        selected: false
        title: 变���聚合器 2
        type: variable-aggregator
        variables:
        - - sys
          - query
      height: 108
      id: '1741752422390'
      position:
        x: 1084.9316558973724
        y: 614.2042078714989
      positionAbsolute:
        x: 1084.9316558973724
        y: 614.2042078714989
      selected: false
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    - data:
        context:
          enabled: false
          variable_selector: []
        desc: ''
        model:
          completion_params:
            temperature: 0.7
          mode: chat
          name: qwen2.5-7b-instruct
          provider: tongyi
        prompt_template:
        - id: 441088fc-999d-4fb0-8fb8-7434b4b4fe10
          role: system
          text: 你是一个智能助手
        - id: 0f7716c4-be2e-4064-b186-1ed4c580e98d
          role: user
          text: '{{#sys.query#}}'
        selected: false
        title: LLM 2
        type: llm
        variables: []
        vision:
          enabled: false
      height: 97
      id: '1741752476950'
      position:
        x: 1479.498326710238
        y: 50.819810969560464
      positionAbsolute:
        x: 1479.498326710238
        y: 50.819810969560464
      selected: false
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    - data:
        answer: '{{#1741752476950.text#}}'
        desc: ''
        selected: false
        title: 直接回复
        type: answer
        variables: []
      height: 102
      id: '1741752500566'
      position:
        x: 1814.5431463289553
        y: 50.819810969560464
      positionAbsolute:
        x: 1814.5431463289553
        y: 50.819810969560464
      selected: false
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    - data:
        context:
          enabled: false
          variable_selector: []
        desc: ''
        model:
          completion_params:
            temperature: 0.7
          mode: chat
          name: qwen2.5-7b-instruct
          provider: tongyi
        prompt_template:
        - id: 441088fc-999d-4fb0-8fb8-7434b4b4fe10
          role: system
          text: 你是一个智能助手
        - id: 0f7716c4-be2e-4064-b186-1ed4c580e98d
          role: user
          text: '{{#sys.query#}}'
        selected: false
        title: LLM 2 (1)
        type: llm
        variables: []
        vision:
          enabled: false
      height: 97
      id: '17417525115180'
      position:
        x: 1399.1401097354772
        y: 607.336782222121
      positionAbsolute:
        x: 1399.1401097354772
        y: 607.336782222121
      selected: false
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    - data:
        answer: '{{#17417525115180.text#}}'
        desc: ''
        selected: false
        title: 直接回复 2
        type: answer
        variables: []
      height: 102
      id: '1741752521689'
      position:
        x: 1749.2303080169243
        y: 607.336782222121
      positionAbsolute:
        x: 1749.2303080169243
        y: 607.336782222121
      selected: false
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    - data:
        classes:
        - id: '1'
          name: AI
        - id: '2'
          name: NBA
        desc: ''
        instructions: ''
        model:
          completion_params:
            temperature: 0.7
          mode: chat
          name: qwen2.5-7b-instruct
          provider: tongyi
        query_variable_selector:
        - '1741752284478'
        - sys.query
        selected: false
        title: 问题分类器
        topics: []
        type: question-classifier
        vision:
          enabled: false
      height: 175
      id: '1741753169252'
      position:
        x: 689.7271713683517
        y: -74.11560036105249
      positionAbsolute:
        x: 689.7271713683517
        y: -74.11560036105249
      selected: false
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    - data:
        classes:
        - id: '1'
          name: AI
        - id: '2'
          name: NBA
        desc: ''
        instructions: ''
        model:
          completion_params:
            temperature: 0.7
          mode: chat
          name: qwen2.5-7b-instruct
          provider: tongyi
        query_variable_selector:
        - '1741752284478'
        - sys.query
        selected: false
        title: 问题分类器 2
        topics: []
        type: question-classifier
        vision:
          enabled: false
      height: 175
      id: '1741753191614'
      position:
        x: 580.3201175414563
        y: 490.70049614910124
      positionAbsolute:
        x: 580.3201175414563
        y: 490.70049614910124
      selected: false
      sourcePosition: right
      targetPosition: left
      type: custom
      width: 244
    viewport:
      x: -179.47546784855808
      y: 546.9575769227345
      zoom: 0.5946035697843213

✔️ Expected Behavior

Streaming Response

❌ Actual Behavior

Streaming Response Broken

Originally created by @zhudongwork on GitHub (Mar 13, 2025). Originally assigned to: @Nov1c444 on GitHub. ### Self Checks - [x] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general). - [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones. - [x] I confirm that I am using English to submit this report (我已阅读并同意 [Language Policy](https://github.com/langgenius/dify/issues/1542)). - [x] [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:） - [x] Please do not modify this template :) and fill in all the required fields. ### Dify version 0.15.3 ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce # Problem Description When I use two Question Classification components and perform cross-aggregation, streaming output is not possible. The same DSL file can achieve normal streaming output in version 0.10.2. # Test case ## input `1 what's AI` ## screen shoot ![Image](https://github.com/user-attachments/assets/a971e4ce-35b5-4ec6-9482-1a7baf0c08e5) ![Image](https://github.com/user-attachments/assets/38b77638-a04e-4083-a2b8-525f2ad039c0) ## DSL file ``` app: description: '' icon: https://zswl-nav.oss-cn-hangzhou.aliyuncs.com/big-dipper/agent_app_icon.svg icon_background: '' mode: advanced-chat name: 分类测试 use_icon_as_answer_icon: false kind: app version: 0.1.5 workflow: conversation_variables: [] environment_variables: [] features: file_upload: allowed_file_extensions: - .JPG - .JPEG - .PNG - .GIF - .WEBP - .SVG allowed_file_types: - image allowed_file_upload_methods: - local_file - remote_url enabled: false fileUploadConfig: audio_file_size_limit: 50 batch_count_limit: 5 file_size_limit: 15 image_file_size_limit: 10 video_file_size_limit: 100 workflow_file_upload_limit: 10 image: enabled: false number_limits: 3 transfer_methods: - local_file - remote_url number_limits: 3 opening_statement: '' retriever_resource: enabled: true sensitive_word_avoidance: enabled: false speech_to_text: enabled: false suggested_questions: [] suggested_questions_after_answer: enabled: false text_to_speech: enabled: false language: '' voice: '' graph: edges: - data: isInIteration: false sourceType: start targetType: if-else id: 1741752284478-source-1741752315248-target source: '1741752284478' sourceHandle: source target: '1741752315248' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: variable-aggregator targetType: llm id: 1741752409392-source-1741752476950-target source: '1741752409392' sourceHandle: source target: '1741752476950' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: llm targetType: answer id: 1741752476950-source-1741752500566-target source: '1741752476950' sourceHandle: source target: '1741752500566' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: variable-aggregator targetType: llm id: 1741752422390-source-17417525115180-target source: '1741752422390' sourceHandle: source target: '17417525115180' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: llm targetType: answer id: 17417525115180-source-1741752521689-target source: '17417525115180' sourceHandle: source target: '1741752521689' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: if-else targetType: question-classifier id: 1741752315248-true-1741753169252-target source: '1741752315248' sourceHandle: 'true' target: '1741753169252' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: question-classifier targetType: variable-aggregator id: 1741753169252-1-1741752409392-target source: '1741753169252' sourceHandle: '1' target: '1741752409392' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: if-else targetType: question-classifier id: 1741752315248-false-1741753191614-target source: '1741752315248' sourceHandle: 'false' target: '1741753191614' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: question-classifier targetType: variable-aggregator id: 1741753169252-2-1741752422390-target source: '1741753169252' sourceHandle: '2' target: '1741752422390' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: question-classifier targetType: variable-aggregator id: 1741753191614-2-1741752422390-target source: '1741753191614' sourceHandle: '2' target: '1741752422390' targetHandle: target type: custom zIndex: 0 - data: isInIteration: false sourceType: question-classifier targetType: variable-aggregator id: 1741753191614-1-1741752409392-target source: '1741753191614' sourceHandle: '1' target: '1741752409392' targetHandle: target type: custom zIndex: 0 nodes: - data: desc: '' selected: false title: 开始 type: start variables: [] height: 53 id: '1741752284478' position: x: -129.38320907155503 y: 234.43171572743677 positionAbsolute: x: -129.38320907155503 y: 234.43171572743677 selected: true sourcePosition: right targetPosition: left type: custom width: 244 - data: cases: - case_id: 'true' conditions: - comparison_operator: contains id: fbc8fda1-1261-419c-a35e-f683f0852888 value: '1' varType: string variable_selector: - sys - query id: 'true' logical_operator: and desc: '' selected: false title: 条件分支 type: if-else height: 125 id: '1741752315248' position: x: 249.47152014309233 y: 234.43171572743677 positionAbsolute: x: 249.47152014309233 y: 234.43171572743677 selected: false sourcePosition: right targetPosition: left type: custom width: 244 - data: desc: '' output_type: string selected: false title: 变量聚合器 type: variable-aggregator variables: - - sys - query height: 108 id: '1741752409392' position: x: 1119.3936288724205 y: 50.819810969560464 positionAbsolute: x: 1119.3936288724205 y: 50.819810969560464 selected: false sourcePosition: right targetPosition: left type: custom width: 244 - data: desc: '' output_type: string selected: false title: 变���聚合器 2 type: variable-aggregator variables: - - sys - query height: 108 id: '1741752422390' position: x: 1084.9316558973724 y: 614.2042078714989 positionAbsolute: x: 1084.9316558973724 y: 614.2042078714989 selected: false sourcePosition: right targetPosition: left type: custom width: 244 - data: context: enabled: false variable_selector: [] desc: '' model: completion_params: temperature: 0.7 mode: chat name: qwen2.5-7b-instruct provider: tongyi prompt_template: - id: 441088fc-999d-4fb0-8fb8-7434b4b4fe10 role: system text: 你是一个智能助手 - id: 0f7716c4-be2e-4064-b186-1ed4c580e98d role: user text: '{{#sys.query#}}' selected: false title: LLM 2 type: llm variables: [] vision: enabled: false height: 97 id: '1741752476950' position: x: 1479.498326710238 y: 50.819810969560464 positionAbsolute: x: 1479.498326710238 y: 50.819810969560464 selected: false sourcePosition: right targetPosition: left type: custom width: 244 - data: answer: '{{#1741752476950.text#}}' desc: '' selected: false title: 直接回复 type: answer variables: [] height: 102 id: '1741752500566' position: x: 1814.5431463289553 y: 50.819810969560464 positionAbsolute: x: 1814.5431463289553 y: 50.819810969560464 selected: false sourcePosition: right targetPosition: left type: custom width: 244 - data: context: enabled: false variable_selector: [] desc: '' model: completion_params: temperature: 0.7 mode: chat name: qwen2.5-7b-instruct provider: tongyi prompt_template: - id: 441088fc-999d-4fb0-8fb8-7434b4b4fe10 role: system text: 你是一个智能助手 - id: 0f7716c4-be2e-4064-b186-1ed4c580e98d role: user text: '{{#sys.query#}}' selected: false title: LLM 2 (1) type: llm variables: [] vision: enabled: false height: 97 id: '17417525115180' position: x: 1399.1401097354772 y: 607.336782222121 positionAbsolute: x: 1399.1401097354772 y: 607.336782222121 selected: false sourcePosition: right targetPosition: left type: custom width: 244 - data: answer: '{{#17417525115180.text#}}' desc: '' selected: false title: 直接回复 2 type: answer variables: [] height: 102 id: '1741752521689' position: x: 1749.2303080169243 y: 607.336782222121 positionAbsolute: x: 1749.2303080169243 y: 607.336782222121 selected: false sourcePosition: right targetPosition: left type: custom width: 244 - data: classes: - id: '1' name: AI - id: '2' name: NBA desc: '' instructions: '' model: completion_params: temperature: 0.7 mode: chat name: qwen2.5-7b-instruct provider: tongyi query_variable_selector: - '1741752284478' - sys.query selected: false title: 问题分类器 topics: [] type: question-classifier vision: enabled: false height: 175 id: '1741753169252' position: x: 689.7271713683517 y: -74.11560036105249 positionAbsolute: x: 689.7271713683517 y: -74.11560036105249 selected: false sourcePosition: right targetPosition: left type: custom width: 244 - data: classes: - id: '1' name: AI - id: '2' name: NBA desc: '' instructions: '' model: completion_params: temperature: 0.7 mode: chat name: qwen2.5-7b-instruct provider: tongyi query_variable_selector: - '1741752284478' - sys.query selected: false title: 问题分类器 2 topics: [] type: question-classifier vision: enabled: false height: 175 id: '1741753191614' position: x: 580.3201175414563 y: 490.70049614910124 positionAbsolute: x: 580.3201175414563 y: 490.70049614910124 selected: false sourcePosition: right targetPosition: left type: custom width: 244 viewport: x: -179.47546784855808 y: 546.9575769227345 zoom: 0.5946035697843213 ``` ### ✔️ Expected Behavior Streaming Response ### ❌ Actual Behavior Streaming Response Broken
yindo added the 🐞 bugstale labels 2026-02-21 18:50:47 -05:00
yindo closed this issue 2026-02-21 18:50:47 -05:00
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Reference: langgenius/dify#10759
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