I'm having an issue that's come up multiple times before, but none of the previous answers seem to help me here.

I'm running Celery (via Docker/Kubernetes) with a Redis back-end. I'm using this command:

celery worker --uid 33 -A finimize_django --loglevel=DEBUG -E

(I've just set it to debug now)

I am using celery==4.3.0 and redis==3.2.1.

Whenever I run celery -A app_name status I get:

Error: No nodes replied within time constraint.

What's weird is Celery seems to be working fine. I can see tasks being processed, and even if I monitor Redis stuff seems to be running successfully. This has also been running fine in production for months, only for this to start happening last week.

It is causing a problem because my liveness probe kills the pod because of this error message.

How can I debug the underlying issue? There is nothing in the log output that is erroring.

Thanks!