Why do Satellite 6 repository tasks fail with error "DocumentTooLarge: command document too large"?

Issue

• Why do repository tasks fail with error "DocumentTooLarge: command document too large"?

Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608) command document too large
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608) Traceback (most recent call last):
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib/python2.7/site-packages/pulp_rpm/plugins/importers/yum/sync.py", line 275, in run
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     self.get_errata(metadata_files)
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib/python2.7/site-packages/pulp_rpm/plugins/importers/yum/sync.py", line 794, in get_errata
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     updateinfo.process_package_element, additive_type=True)
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib/python2.7/site-packages/pulp_rpm/plugins/importers/yum/sync.py", line 887, in save_fileless_units
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     model = self._concatenate_units(existing_unit, model)
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib/python2.7/site-packages/pulp_rpm/plugins/importers/yum/sync.py", line 932, in _concatenate_units
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     existing_unit.merge_errata(new_unit)
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib/python2.7/site-packages/pulp_rpm/plugins/db/models.py", line 705, in merge_errata
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     self.merge_pkglists_and_save(other)
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib/python2.7/site-packages/pulp_rpm/plugins/db/models.py", line 802, in merge_pkglists_and_save
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     self.save()
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib/python2.7/site-packages/mongoengine/document.py", line 367, in save
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     upsert=upsert, **write_concern)
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib64/python2.7/site-packages/pymongo/collection.py", line 2232, in update
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     check_keys, multi, manipulate, write_concern)
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib64/python2.7/site-packages/pymongo/collection.py", line 709, in _update
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     codec_options=self.codec_options).copy()
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib64/python2.7/site-packages/pymongo/pool.py", line 216, in command
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     self._raise_connection_failure(error)
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)   File "/usr/lib64/python2.7/site-packages/pymongo/pool.py", line 343, in _raise_connection_failure
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608)     raise error
Feb 21 12:38:13 hostname pulp: pulp_rpm.plugins.importers.yum.sync:ERROR: (75482-24608) DocumentTooLarge: command document too large