Comment 3 for bug 1646841

2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server self.force_reraise()
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_db/api.py", line 139, in wrapper
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server return f(*args, **kwargs)
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 240, in wrapped
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server return f(context, *args, **kwargs)
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 2635, in instance_update_and_get_original
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server context, instance_uuid, values, expected, original=instance_ref))
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 2771, in _instance_update
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server raise exc(**exc_props)
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server
2016-12-02 21:08:50.605 24224 ERROR oslo_messaging.rpc.server UnexpectedTaskStateError: Conflict updating instance b8cb5d2e-2e61-45af-ab5a-bfe2d78b5ca0. Expected: {'task_state': [u'image_snapshot_pending']}. Actual: {'task_state': None}

2016-12-02 21:08:21.867 24224 DEBUG nova.compute.manager [req-4edf093f-c870-4933-bc8d-17f69149597d - - - - -] [instance: b8cb5d2e-2e61-45af-ab5a-bfe2d78b5ca0] Instance in transitional state image_snapshot_pending at start-up clearing task state _init_instance /usr/lib/python2.7/site-packages/nova/compute/manager.py:826

more than snapshoting....

seems