The Pulp 2 to Pulp 3 migration stucks and raises 'pymongo.errors.DocumentTooLarge' error in /var/log/messages file

Issue

• The Pulp 2 to Pulp 3 migration stucks and raises the following pymongo.errors.DocumentTooLarge error in /var/log/messages file:

  pulpcore-worker-4: RuntimeWarning)
  pulpcore-worker-4: pulp: rq.worker:ERROR: Traceback (most recent call last):
  pulpcore-worker-4: File "/usr/lib/python3.6/site-packages/rq/worker.py", line 936, in perform_job
  .....
  pulpcore-worker-4: (max_doc_size, self.max_bson_size))
  pulpcore-worker-4: pymongo.errors.DocumentTooLarge: BSON document too large (32444638 bytes) - the connected server supports BSON document sizes up to 16777216 bytes.