Pulp

After a postgres outage a couple of tasks were started on workers which logs claim to have been removed. The tasks then got stuck in a 'waiting' state and I had to cancel them to make them go away.

Logs showing worker being removed:

May 19 10:56:34 lxserv2285 rq[589125]: pulp [None]: pulpcore.tasking.worker_watcher:ERROR: Worker '2961917@lxserv2285' has gone missing, removing from list of workers
May 19 10:56:34 lxserv2285 rq[589125]: pulp [None]: pulpcore.tasking.worker_watcher:ERROR: The worker named 2961917@lxserv2285 is missing. Canceling the tasks in its queue.

Task being started after removal of workers (snippet):

{                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    "pulp_created": "2021-05-19T10:57:17.819927Z",                                                                                                                                                                                                                                  "state": "waiting",                                                                                                                                                                                                                                                             
  "worker": "/pulp/api/v3/workers/4d159eb5-01e4-4750-a921-c5b28c411e4a/",
  }

The worker above is the worker that had been removed.

Any idea why the task was started on a worker that should have been removed from the list of workers?

On RHEL8, with python3-pulpcore-3.11.0-1.el8.noarch