pallets / pallets/quart

Task was destroyed but it is pending!

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Description

The error message is telling us that a task was destroyed, but it's still pending. Specifically, we have a task with the name 'Task-1672902' that was in the middle of running the handle_messages() function at /usr/local/lib/python3.8/site-packages/quart/asgi.py:56. But for some reason, it got destroyed before it could complete.

The message:
Task was destroyed but it is pending!
task: <Task pending name='Task-1672902' coro=<ASGIHTTPConnection.handle_messages() running at /usr/local/lib/python3.8/site-packages/quart/asgi.py:56> wait_for=<Future pending cb=[<TaskWakeupMethWrapper object at 0x7feb66ff0190>()]>>

Environment:

  • Python version: 3.8.12
  • Quart version: 0.19.3

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First steps

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Research direction

Start with the reported warning and the Quart entry point at /usr/local/lib/python3.8/site-packages/quart/asgi.py:56, where ASGIHTTPConnection.handle_messages() is running. Reproduce it with Python 3.8.12 and Quart 0.19.3, then trace the connection and task lifecycle; done means the reported pending-task warning no longer occurs.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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