Error: TypeError: expected str, bytes or os.PathLike object, not NoneType

Sometimes i get this error:

Traceback (most recent call last):
  File "/opt/homebrew/Cellar/python@3.10/3.10.15/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/process.py", line 314, in _bootstrap
    self.run()
  File "/opt/homebrew/Cellar/python@3.10/3.10.15/Frameworks/Python.framework/Versions/3.10/lib/python3.10/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "/opt/homebrew/lib/python3.10/site-packages/django_q/cluster.py", line 165, in __init__
    self.start()
  File "/opt/homebrew/lib/python3.10/site-packages/django_q/cluster.py", line 174, in start
    self.guard()
  File "/opt/homebrew/lib/python3.10/site-packages/django_q/cluster.py", line 315, in guard
    self.reincarnate(p)
  File "/opt/homebrew/lib/python3.10/site-packages/django_q/cluster.py", line 234, in reincarnate
    prometheus_multiprocess.mark_process_dead(process.pid)
  File "/opt/homebrew/lib/python3.10/site-packages/prometheus_client/multiprocess.py", line 169, in mark_process_dead
    for f in glob.glob(os.path.join(path, f'gauge_{mode}_{pid}.db')):
  File "/opt/homebrew/Cellar/python@3.10/3.10.15/Frameworks/Python.framework/Versions/3.10/lib/python3.10/posixpath.py", line 76, in join
    a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not NoneType

It happen here:

https://github.com/django-q2/django-q2/blob/337a5782d9113a6e9d058743488e7517aebb8280/django_q/cluster.py#L233-L234

When mark_process_dead is called.

Can you help me?

Thanks.

Beginne in django_q/cluster.py ungefähr bei den Zeilen 233–234 und verfolge den Aufruf bis zu prometheus_client.multiprocess.mark_process_dead. Reproduziere den Fehler und untersuche, warum der an os.path.join übergebene Pfad None ist. Als erledigt gilt die Aufgabe, wenn die Ursache bestätigt ist und das fehlschlagende Szenario ein definiertes, verifiziertes Verhalten hat.