Docker restart leads to errors

I was running occ face:background_job on nextcloud server, and face detection on separate server. During this process, I restarted remote face detection server and expected continuation of background_job detection. However, this led to these errors:

XXX.XXX.XXX.XXX - - [09/Nov/2023 07:08:54] "POST /detect HTTP/1.1" 500 -
[2023-11-09 07:08:58,550] ERROR in app: Exception on /detect [POST]
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/flask/app.py", line 1455, in wsgi_app
    response = self.full_dispatch_request()
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/flask/app.py", line 869, in full_dispatch_request
    rv = self.handle_user_exception(e)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/flask/app.py", line 867, in full_dispatch_request
    rv = self.dispatch_request()
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/flask/app.py", line 852, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/facerecognition-external-model.py", line 60, in decorated_function
    return view_function(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/facerecognition-external-model.py", line 148, in detect_faces
    faces = DETECT_FACES_FUNCTIONS[FACE_MODEL](img)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/facerecognition-external-model.py", line 116, in cnn_hog_detect
    cnn_faces = cnn_detect(img)
                ^^^^^^^^^^^^^^^
  File "/app/facerecognition-external-model.py", line 69, in cnn_detect
    dets: list = CNN_DETECTOR(img)
                 ^^^^^^^^^^^^^^^^^
TypeError: 'NoneType' object is not callable

I did not know how to resolve this, but I went into in nextcloud admin panel, face recognition menu, and the process seems to have properly started to work again:

....
TypeError: 'NoneType' object is not callable
XXX.XXX.XXX.XXX - - [09/Nov/2023 08:14:13] "POST /detect HTTP/1.1" 500 -
XXX.XXX.XXX.XXX - - [09/Nov/2023 08:14:17] "GET /open HTTP/1.1" 200 -
XXX.XXX.XXX.XXX - - [09/Nov/2023 08:14:35] "POST /detect HTTP/1.1" 200 -
XXX.XXX.XXX.XXX - - [09/Nov/2023 08:14:58] "POST /detect HTTP/1.1" 200 -
...

matiasdelellis / facerecognition-external-model

Docker restart leads to errors #10