Comment 1 for bug 1963907

BY taking a look at F020 error logs on compute nodes:
```
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db Traceback (most recent call last):
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db File "/usr/lib/python3.9/site-packages/nova/servicegroup/drivers/db.py", line 92, in _report_state
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db service.service_ref.save()
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db File "/usr/lib/python3.9/site-packages/oslo_versionedobjects/base.py", line 209, in wrapper
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db updates, result = self.indirection_api.object_action(
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db File "/usr/lib/python3.9/site-packages/nova/conductor/rpcapi.py", line 247, in object_action
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db return cctxt.call(context, 'object_action', objinst=objinst,
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db File "/usr/lib/python3.9/site-packages/oslo_messaging/rpc/client.py", line 189, in call
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db result = self.transport._send(
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db File "/usr/lib/python3.9/site-packages/oslo_messaging/transport.py", line 123, in _send
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db return self._driver.send(target, ctxt, message,
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db File "/usr/lib/python3.9/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 689, in send
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db return self._send(target, ctxt, message, wait_for_reply, timeout,
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db File "/usr/lib/python3.9/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 681, in _send
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db raise result
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db oslo_messaging.rpc.client.RemoteError: Remote error: DBConnectionError (pymysql.err.OperationalError) (2013, 'Lost connection to MySQL server during query')
2022-03-08 11:05:19.332 2 ERROR nova.servicegroup.drivers.db (Background on this error at: https://sqlalche.me/e/14/e3q8)

```

Logs: https://logserver.rdoproject.org/openstack-periodic-integration-main/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-9-ovb-1ctlr_2comp-featureset020-master/3b6a109/logs/overcloud-novacompute-1/var/log/containers/nova/nova-compute.log.txt.gz

and the same tempest tests are failing here also with above reason: https://logserver.rdoproject.org/openstack-periodic-integration-main/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-9-ovb-1ctlr_2comp-featureset020-master/3b6a109/logs/undercloud/var/log/tempest/failing_tests.log.txt.gz