I have celerybeat running as a service on ubuntu.

Generally speaking, everything works great. I have the same setup on numerous servers.

Last night, I noticed the frequency at which a certain task was firing was doubled; seemingly out of the blue. In order to troubleshoot I did a few things:

• cleared the redis server + celery message queues
• restarted the celerybeat service
• restarted the redis-server service

When those did not change the behavior, I tried:

• rebooting the server
• stopping the celerybeat service
• stopping the redis-server service

Even after a reboot and having all the services stopped, the task is still being triggered! I have never encountered this kind of behavior before.

How can the task continue to be triggered even without a messaging service?

Any help or troubleshooting ideas here would be really appreciated.

Thanks in advance.