Comment 6 for bug 1957939

I have found similar errors in the nova debug log as those reported in the bug report above. To be honest I don't have the knowledge to identify this as the root cause but in the previous bug report one of the developers claims that these logs entries are related to the problem and it's "a legit nova bug"

2022-01-21 17:15:09.421 7 DEBUG nova.compute.manager [req-c99a6c87-b072-4960-8ef1-f4ec3a7eaa6c 611779e17c1d46d497c03be4ff61db7e d51060ea788b4430bad788cbc8e0bdd9 - default default] [instance: 5d7e2d79-e20c-4c3c-9a23-b3c54f6d35dc] No waiting events found dispatching network-vif-plugged-64146d55-e450-4329-9340-36409145ab95 pop_instance_event /var/lib/kolla/venv/lib/python3.6/site-packages/nova/compute/manager.py:319

2022-01-21 17:16:20.347 7 DEBUG nova.compute.manager [req-39c7bc03-cf1b-42f7-a3ce-2bf9048a59d1 611779e17c1d46d497c03be4ff61db7e d51060ea788b4430bad788cbc8e0bdd9 - default default] [instance: 5d7e2d79-e20c-4c3c-9a23-b3c54f6d35dc] No waiting events found dispatching network-vif-plugged-64146d55-e450-4329-9340-36409145ab95 pop_instance_event /var/lib/kolla/venv/lib/python3.6/site-packages/nova/compute/manager.py:319

2022-01-21 17:15:44.303 7 DEBUG nova.compute.manager [req-c83d4dc4-9dd6-45d7-8e2a-8857192f8233 648668eab36942a88df88fae42ca1a99 70bb85f24e6e46298e6adc980761f9d9 - default default] [instance: 5d7e2d79-e20c-4c3c-9a23-b3c54f6d35dc] Preparing to wait for external event network-vif-plugged-64146d55-e450-4329-9340-36409145ab95 prepare_for_instance_event /var/lib/kolla/venv/lib/python3.6/site-packages/nova/compute/manager.py:281

2022-01-21 17:17:52.757 7 DEBUG nova.compute.manager [req-06a3a008-388d-417c-9304-83984b71b04a 648668eab36942a88df88fae42ca1a99 70bb85f24e6e46298e6adc980761f9d9 - default default] [instance: 5d7e2d79-e20c-4c3c-9a23-b3c54f6d35dc] Preparing to wait for external event network-vif-plugged-64146d55-e450-4329-9340-36409145ab95 prepare_for_instance_event /var/lib/kolla/venv/lib/python3.6/site-packages/nova/compute/manager.py:281