Celery worker state changes to offline after a while, how to process it?

Question

After several hours running, worker appear as offline in flower.

This is what the container shows

Solution:

I solved my problem by setting a password on Redis. this worked for me

Answer 1

The reason is obvious. The underlined log output is not important, what is important is the error that was logged before - the You can't write against a read only replica. Looks like your result backend (Redis) is read-only, so Celery can't write results there.

You have two options here:

1. Modify the Redis server to run in read-write state.
2. Change the result backend to something else.