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Can't patch loop of type <class 'uvloop.Loop'> #2

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opened 2026-02-16 06:15:36 -05:00 by yindo · 4 comments
yindo commented 2026-02-16 06:15:36 -05:00
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Originally created by @fatadel on GitHub (Feb 7, 2025).

Checked other resources

  • I added a very descriptive title to this issue.
  • I searched the LangChain documentation with the integrated search.
  • I used the GitHub search to find a similar question and didn't find it.
  • I am sure that this is a bug in LangChain rather than my code.
  • The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

This is a duplicate of https://github.com/langchain-ai/langchain/issues/26294 because that issue is closed without any solution.

Basically, using UnstructuredLoader from langchain_unstructured inside a FastAPI app running with uvloop instead of asyncio loop results in Can't patch loop of type <class 'uvloop.Loop'> error.

Error Message and Stack Trace (if applicable)

No response

Description

UnstructuredLoader should work inside FastAPI regardless of what mode is used in FastAPI.

System Info

aiocache==0.12.3
aiofiles==24.1.0
aiohttp==3.9.5
aiosignal==1.3.1
aiostream==0.6.2
alembic==1.13.3
amqp==5.2.0
annotated-types==0.7.0
antlr4-python3-runtime==4.9.3
anyio==4.4.0
async-timeout==4.0.3
attrs==23.2.0
backoff==2.2.1
beautifulsoup4==4.12.3
bidict==0.23.1
billiard==4.2.1
cachetools==5.5.0
celery==5.4.0
certifi==2024.7.4
cffi==1.16.0
chardet==5.2.0
charset-normalizer==3.3.2
click==8.1.7
click-didyoumean==0.3.1
click-plugins==1.1.1
click-repl==0.3.0
coloredlogs==15.0.1
contourpy==1.3.1
cryptography==43.0.0
cycler==0.12.1
dataclasses-json==0.6.7
debugpy==1.8.5
Deprecated==1.2.15
dill==0.3.9
distro==1.9.0
dnspython==2.6.1
ecdsa==0.19.0
effdet==0.4.1
email_validator==2.2.0
emoji==2.14.0
eval_type_backport==0.2.2
exceptiongroup==1.2.2
fastapi==0.111.1
fastapi-cli==0.0.4
filelock==3.16.1
filetype==1.2.0
flatbuffers==24.12.23
flower==2.0.1
fonttools==4.55.3
frozenlist==1.4.1
fsspec==2024.12.0
google-api-core==2.24.0
google-auth==2.37.0
google-cloud-vision==3.9.0
googleapis-common-protos==1.66.0
greenlet==3.0.3
grpcio==1.69.0
grpcio-status==1.69.0
grpcio-tools==1.66.1
gunicorn==23.0.0
h11==0.14.0
h2==4.1.0
hpack==4.0.0
html5lib==1.1
httpcore==1.0.5
httptools==0.6.1
httpx==0.27.0
httpx-sse==0.4.0
huggingface-hub==0.27.0
humanfriendly==10.0
humanize==4.11.0
hyperframe==6.0.1
idna==3.7
iniconfig==2.0.0
iopath==0.1.10
iso-639==0.4.5
Jinja2==3.1.4
jiter==0.8.2
joblib==1.4.2
jsonpatch==1.33
jsonpath-python==1.0.6
jsonpointer==3.0.0
kiwisolver==1.4.8
kombu==5.4.2
langchain==0.3.14
langchain-community==0.3.14
langchain-core==0.3.33
langchain-openai==0.3.3
langchain-text-splitters==0.3.4
langchain-unstructured==0.1.6
langdetect==1.0.9
langsmith==0.2.10
layoutparser==0.3.4
lxml==5.3.0
Mako==1.3.5
markdown-it-py==3.0.0
MarkupSafe==2.1.5
marshmallow==3.21.3
matplotlib==3.10.0
mdurl==0.1.2
mpire==2.10.2
mpmath==1.3.0
multidict==6.0.5
multiprocess==0.70.17
mypy-extensions==1.0.0
ndjson==0.3.1
nest-asyncio==1.6.0
networkx==3.4.2
nltk==3.9.1
numpy==1.26.4
olefile==0.47
omegaconf==2.3.0
onnx==1.17.0
onnxruntime==1.19.2
openai==1.59.3
opencv-python==4.10.0.84
orjson==3.10.6
packaging==24.1
pandas==2.2.3
pdf2image==1.17.0
pdfminer.six==20231228
pdfplumber==0.11.5
pi_heif==0.21.0
pikepdf==9.5.1
pillow==10.4.0
pip-autoremove==0.10.0
pipdeptree==2.24.0
pluggy==1.5.0
portalocker==2.10.1
prometheus_client==0.21.0
prompt_toolkit==3.0.48
proto-plus==1.25.0
protobuf==5.28.0
psutil==6.1.1
psycopg==3.2.4
psycopg-binary==3.2.4
psycopg-pool==3.2.4
pyalex==0.15
pyasn1==0.6.0
pyasn1_modules==0.4.1
pycocotools==2.0.8
pycountry==24.6.1
pycparser==2.22
pydantic==2.9.2
pydantic-settings==2.7.0
pydantic_core==2.23.4
Pygments==2.18.0
pyparsing==3.2.1
pypdf==4.3.1
pypdfium2==4.30.1
pytest==8.3.2
pytest-asyncio==0.23.8
python-dateutil==2.9.0.post0
python-dotenv==1.0.1
python-engineio @ git+https://github.com/fatadel/python-engineio.git@b137e2c21deee534533b6ace82f758df8ccc6d3f
python-iso639==2024.10.22
python-jose==3.3.0
python-magic==0.4.27
python-multipart==0.0.9
python-oxmsg==0.0.1
python-socketio==5.11.4
pytz==2024.2
PyYAML==6.0.1
qdrant-client==1.11.1
RapidFuzz==3.11.0
regex==2024.7.24
requests==2.32.3
requests-toolbelt==1.0.0
rich==13.7.1
rsa==4.9
safetensors==0.4.5
scipy==1.14.1
semchunk==2.2.2
sentry-sdk==2.11.0
setuptools==75.6.0
shellingham==1.5.4
simple-websocket==1.0.0
six==1.16.0
sniffio==1.3.1
soupsieve==2.6
SQLAlchemy==2.0.31
sqlmodel==0.0.22
starlette==0.37.2
sympy==1.13.1
tenacity==8.5.0
tiktoken==0.7.0
timm==1.0.13
tokenizers==0.21.0
tomli==2.0.1
torch==2.5.1
torchvision==0.20.1
tornado==6.4.1
tqdm==4.66.4
transformers==4.47.1
typer==0.12.5
typing-inspect==0.9.0
typing_extensions==4.12.2
tzdata==2024.2
unstructured==0.16.12
unstructured-client==0.28.1
unstructured-inference==0.8.1
unstructured.pytesseract==0.3.13
urllib3==2.2.2
uvicorn==0.30.3
uvicorn-worker==0.2.0
uvloop==0.19.0
vine==5.1.0
watchfiles==0.22.0
wcwidth==0.2.13
webencodings==0.5.1
websockets==12.0
wrapt==1.17.1
wsproto==1.2.0
yarl==1.9.4

Originally created by @fatadel on GitHub (Feb 7, 2025). ### Checked other resources - [x] I added a very descriptive title to this issue. - [x] I searched the LangChain documentation with the integrated search. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than my code. - [x] The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package). ### Example Code This is a duplicate of https://github.com/langchain-ai/langchain/issues/26294 because that issue is closed without any solution. Basically, using `UnstructuredLoader` from `langchain_unstructured` inside a FastAPI app running with uvloop instead of asyncio loop results in `Can't patch loop of type <class 'uvloop.Loop'>` error. ### Error Message and Stack Trace (if applicable) _No response_ ### Description UnstructuredLoader should work inside FastAPI regardless of what mode is used in FastAPI. ### System Info aiocache==0.12.3 aiofiles==24.1.0 aiohttp==3.9.5 aiosignal==1.3.1 aiostream==0.6.2 alembic==1.13.3 amqp==5.2.0 annotated-types==0.7.0 antlr4-python3-runtime==4.9.3 anyio==4.4.0 async-timeout==4.0.3 attrs==23.2.0 backoff==2.2.1 beautifulsoup4==4.12.3 bidict==0.23.1 billiard==4.2.1 cachetools==5.5.0 celery==5.4.0 certifi==2024.7.4 cffi==1.16.0 chardet==5.2.0 charset-normalizer==3.3.2 click==8.1.7 click-didyoumean==0.3.1 click-plugins==1.1.1 click-repl==0.3.0 coloredlogs==15.0.1 contourpy==1.3.1 cryptography==43.0.0 cycler==0.12.1 dataclasses-json==0.6.7 debugpy==1.8.5 Deprecated==1.2.15 dill==0.3.9 distro==1.9.0 dnspython==2.6.1 ecdsa==0.19.0 effdet==0.4.1 email_validator==2.2.0 emoji==2.14.0 eval_type_backport==0.2.2 exceptiongroup==1.2.2 fastapi==0.111.1 fastapi-cli==0.0.4 filelock==3.16.1 filetype==1.2.0 flatbuffers==24.12.23 flower==2.0.1 fonttools==4.55.3 frozenlist==1.4.1 fsspec==2024.12.0 google-api-core==2.24.0 google-auth==2.37.0 google-cloud-vision==3.9.0 googleapis-common-protos==1.66.0 greenlet==3.0.3 grpcio==1.69.0 grpcio-status==1.69.0 grpcio-tools==1.66.1 gunicorn==23.0.0 h11==0.14.0 h2==4.1.0 hpack==4.0.0 html5lib==1.1 httpcore==1.0.5 httptools==0.6.1 httpx==0.27.0 httpx-sse==0.4.0 huggingface-hub==0.27.0 humanfriendly==10.0 humanize==4.11.0 hyperframe==6.0.1 idna==3.7 iniconfig==2.0.0 iopath==0.1.10 iso-639==0.4.5 Jinja2==3.1.4 jiter==0.8.2 joblib==1.4.2 jsonpatch==1.33 jsonpath-python==1.0.6 jsonpointer==3.0.0 kiwisolver==1.4.8 kombu==5.4.2 langchain==0.3.14 langchain-community==0.3.14 langchain-core==0.3.33 langchain-openai==0.3.3 langchain-text-splitters==0.3.4 langchain-unstructured==0.1.6 langdetect==1.0.9 langsmith==0.2.10 layoutparser==0.3.4 lxml==5.3.0 Mako==1.3.5 markdown-it-py==3.0.0 MarkupSafe==2.1.5 marshmallow==3.21.3 matplotlib==3.10.0 mdurl==0.1.2 mpire==2.10.2 mpmath==1.3.0 multidict==6.0.5 multiprocess==0.70.17 mypy-extensions==1.0.0 ndjson==0.3.1 nest-asyncio==1.6.0 networkx==3.4.2 nltk==3.9.1 numpy==1.26.4 olefile==0.47 omegaconf==2.3.0 onnx==1.17.0 onnxruntime==1.19.2 openai==1.59.3 opencv-python==4.10.0.84 orjson==3.10.6 packaging==24.1 pandas==2.2.3 pdf2image==1.17.0 pdfminer.six==20231228 pdfplumber==0.11.5 pi_heif==0.21.0 pikepdf==9.5.1 pillow==10.4.0 pip-autoremove==0.10.0 pipdeptree==2.24.0 pluggy==1.5.0 portalocker==2.10.1 prometheus_client==0.21.0 prompt_toolkit==3.0.48 proto-plus==1.25.0 protobuf==5.28.0 psutil==6.1.1 psycopg==3.2.4 psycopg-binary==3.2.4 psycopg-pool==3.2.4 pyalex==0.15 pyasn1==0.6.0 pyasn1_modules==0.4.1 pycocotools==2.0.8 pycountry==24.6.1 pycparser==2.22 pydantic==2.9.2 pydantic-settings==2.7.0 pydantic_core==2.23.4 Pygments==2.18.0 pyparsing==3.2.1 pypdf==4.3.1 pypdfium2==4.30.1 pytest==8.3.2 pytest-asyncio==0.23.8 python-dateutil==2.9.0.post0 python-dotenv==1.0.1 python-engineio @ git+https://github.com/fatadel/python-engineio.git@b137e2c21deee534533b6ace82f758df8ccc6d3f python-iso639==2024.10.22 python-jose==3.3.0 python-magic==0.4.27 python-multipart==0.0.9 python-oxmsg==0.0.1 python-socketio==5.11.4 pytz==2024.2 PyYAML==6.0.1 qdrant-client==1.11.1 RapidFuzz==3.11.0 regex==2024.7.24 requests==2.32.3 requests-toolbelt==1.0.0 rich==13.7.1 rsa==4.9 safetensors==0.4.5 scipy==1.14.1 semchunk==2.2.2 sentry-sdk==2.11.0 setuptools==75.6.0 shellingham==1.5.4 simple-websocket==1.0.0 six==1.16.0 sniffio==1.3.1 soupsieve==2.6 SQLAlchemy==2.0.31 sqlmodel==0.0.22 starlette==0.37.2 sympy==1.13.1 tenacity==8.5.0 tiktoken==0.7.0 timm==1.0.13 tokenizers==0.21.0 tomli==2.0.1 torch==2.5.1 torchvision==0.20.1 tornado==6.4.1 tqdm==4.66.4 transformers==4.47.1 typer==0.12.5 typing-inspect==0.9.0 typing_extensions==4.12.2 tzdata==2024.2 unstructured==0.16.12 unstructured-client==0.28.1 unstructured-inference==0.8.1 unstructured.pytesseract==0.3.13 urllib3==2.2.2 uvicorn==0.30.3 uvicorn-worker==0.2.0 uvloop==0.19.0 vine==5.1.0 watchfiles==0.22.0 wcwidth==0.2.13 webencodings==0.5.1 websockets==12.0 wrapt==1.17.1 wsproto==1.2.0 yarl==1.9.4
yindo commented 2026-02-16 06:15:37 -05:00
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@efriis commented on GitHub (Feb 7, 2025):

moving to langchain-unstructured and tagging in @Coniferish !

@efriis commented on GitHub (Feb 7, 2025): moving to langchain-unstructured and tagging in @Coniferish !
yindo commented 2026-02-16 06:15:37 -05:00
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@Coniferish commented on GitHub (Feb 17, 2025):

fyi, this seems to be originating from an issue in our python-client. I believe @awalker4 is working on this and he or I will provide any updates when we have them.

@Coniferish commented on GitHub (Feb 17, 2025): fyi, this seems to be originating from an issue in our [python-client](https://github.com/Unstructured-IO/unstructured-python-client). I believe @awalker4 is working on this and he or I will provide any updates when we have them.
yindo commented 2026-02-16 06:15:37 -05:00
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@awalker4 commented on GitHub (Mar 6, 2025):

A fix will get into unstructured-client once this pr is ready, and then we can bump the dependency on the langchain side.

@awalker4 commented on GitHub (Mar 6, 2025): A fix will get into `unstructured-client` once [this pr](https://github.com/Unstructured-IO/unstructured-python-client/pull/239) is ready, and then we can bump the dependency on the langchain side.
yindo commented 2026-02-16 06:15:37 -05:00
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@awalker4 commented on GitHub (Aug 1, 2025):

This has been fixed in unstructured-client==0.42.0! You should be able to upgrade the SDK via pip and get the fix into your langchain environment. (I'm not an owner for this repo so I can't close this issue as fixed)

@awalker4 commented on GitHub (Aug 1, 2025): This has been fixed in `unstructured-client==0.42.0`! You should be able to upgrade the SDK via pip and get the fix into your langchain environment. (I'm not an owner for this repo so I can't close this issue as fixed)
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Reference: langchain-ai/langchain-unstructured#2
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