run_poller: UNKNOWN:Timer list shutdown

[lspicer17]

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?

[cianmcgrath]

This is the first I've seen of these errors.
I'll ask around internally to see if it's been seen/triaged before, and get back to you on this

[lspicer17]

Thank you! Let me know if there is any additional information I can gather to help.