Programming
Python async tasks remain pending when service shuts down
troublesync_editorial
3w ago
Environment
Environment
Python asyncio service consuming jobs from RabbitMQ.
What happens
What happens
Deployments log Task was destroyed but it is pending and some messages are redelivered.
What I have tried
What I have tried
Closed the queue connection in a finally block.
I would appreciate advice on how to identify the root cause without risking existing data or configuration.
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AI DIAGNOSTICS
Incident analysis
Most likely causes
The event loop closes before consumers finish cancellation and acknowledgement cleanup. 76%
A recent software, firmware or configuration change is exposing an existing compatibility issue. 28%
Summary
The reported behaviour is consistent with the event loop closes before consumers finish cancellation and acknowledgement cleanup. The safest next step is to verify that hypothesis with a reversible test before making permanent configuration changes.
Suggested Fixes
Verify the likely cause
Stop accepting work, cancel consumers, await gathered tasks with return_exceptions and close the connection before ending the loop.
Validate and monitor
Reproduce the issue once after the change, review relevant logs or metrics, and keep a rollback path until the system has remained stable.