run_poller: UNKNOWN:Timer list shutdown

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
30/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
grpc, python
Domain
api, backend

Research direction

Start by reviewing gRPC's src/core/ext/filters/client_channel/backup_poller.cc around the reported log location and compare it with the Docker-host and gRPC-query conditions described here. Investigate whether the message indicates a client problem, ideally by finding related logs or a reproducible case; done means the cause and any required change are documented.

Written by the indexing model from the issue text.

Description

I'm seeing these logs in stderr from docker hosts running some gRPC queries using this client:

E0921 17:38:25.652816051  244657 backup_poller.cc:124]       run_poller: UNKNOWN:Timer list shutdown {created_time:"2022-09-21T17:38:25.652619086+00:00"}
E0921 19:14:08.230445287  322145 backup_poller.cc:124]       run_poller: UNKNOWN:Timer list shutdown {created_time:"2022-09-21T19:14:08.230375719+00:00"}
E0921 19:23:53.008688653  341242 backup_poller.cc:124]       run_poller: UNKNOWN:Timer list shutdown {created_time:"2022-09-21T19:23:53.008611811+00:00"}

Seems to come from - https://github.com/grpc/grpc/blob/master/src/core/ext/filters/client_channel/backup_poller.cc

Unfortunately, I haven't been able to find or capture any other related messages, and I haven't been able to reproduce it locally. I'm wondering if this is something anyone else has seen?

Dominant language
Python
Stars
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Forks
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