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Created in different context error

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
20/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
fastapi, flask, python
Domain
backend

Research direction

Start with ContextVarsScopeManager and the after_request function in tracer.wrappers.fastapi.fastapi_wrapper, then reproduce the failure using the linked sample project with a Flask WSGI application mounted in FastAPI. Done means closing the scope no longer raises the “created in a different Context” error in that setup.

Written by the indexing model from the issue text.

Description

Hi all,

Everything has worked fine for ContextVarsScopeManager if I have only Fastapi application. But, When I tried to mount a Flask WSGIApplication to the Fastapi application, I've got an error from ContextVarsScopeManager as "<Token var=<ContextVar name='scope' at 0x7ff47d568a90> at 0x7ff47d61fe00> was created in a different Context". This error has been raised from after_request function of tracer.wrappers.fastapi.fastapi_wrapper module while trying to close scope. When I debugged the code, I have found out that "if token._var is not self" check into reset function of ContextVar class has caused this exception. I've created a sample project to reproduce the issue and shared it's Github url below.

Github url: https://github.com/gokhan721/opentracing_contextvar_work

Thanks.

Dominant language
Python
Stars
90
Forks
9
PR merge metrics
No merged PRs in 30d

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