Background workers haven't checked in recently. It seems that you have a backlog of 10664 tasks. Either your workers aren't running or you need more capacity

On-Premise
1

Background workers haven’t checked in recently. It seems that you have a backlog of 10664 tasks. Either your workers aren’t running or you need more capacity.

Sentry 20.9.0.dev0

2

Hello!
Have you found solution?

Our version of Sentry is 20.9.0.dev0a62c9e5 and we have periodically the same problem.
We even introduce checking of /_health/?full endpoint by Prometheus’s blackbox exporter to have alerts about it.

Right now to fix state of Sentry helps restarting of docker container by next command:
docker-compose restart worker

And few words about “you need more capacity”.
For Sentry version 9.1 we used Standard D2s v3 (2 vcpus, 8 GiB memory with Premium SSD) VM in Azure.
After upgrading to current version this message started appeared quite offend. About once per week.
So, 26th of October we upgraded VM to Standard D4s v3 (4 vcpus, 16 GiB memory with Premium SSD) and this message appeared again only today, after 22 days of silence.

Should we change some memory settings or timeouts after we increased amount of memory?

3

Have you tried this: Sentry no more catch errors ?
It helped me when my workers went down.