Comment 0 for bug 1740222

2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 155, in _process_incoming
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server res = self.dispatcher.dispatch(message)
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 222, in dispatch
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server return self._do_dispatch(endpoint, method, ctxt, args)
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 192, in _do_dispatch
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server result = func(ctxt, **new_args)
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/cinder/backup/manager.py", line 403, in create_backup
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server self._update_backup_error(backup, six.text_type(err))
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server self.force_reraise()
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/cinder/backup/manager.py", line 397, in create_backup
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.rpc.server self._run_backup(context, backup, volume)
2017-12-27 14:57:29.295 7 ERROR oslo_messaging.