Comment 5 for bug 1546431

It seems to be happening mostly when we stop the greenthread while deleting an IN_PROGRESS stack and the existing action is interrupted.

In these cases the 'Command Out of Sync' errors are associated with ResourceClosedError.

- Few cases it fails when the thread linked function(release) is called which in turn calls persist_state_and_release_lock[1].
- Other cases it fails while setting the resource state to FAILED[2]

Most of the cases this happens for StackValidationTest where we try to delete(cleanup) an IN_PROGRESS stack.

[1]

http://logs.openstack.org/99/330799/5/gate/gate-heat-dsvm-functional-orig-mysql-lbaasv2/c7e34e3/logs/screen-h-eng.txt.gz#_2016-06-30_05_01_58_311

[2]
http://logs.openstack.org/03/335303/3/check/gate-heat-dsvm-functional-orig-mysql-lbaasv2/ffb5434/logs/screen-h-eng.txt.gz#_2016-06-29_22_17_02_904

There are few other cases it fails with just 'Exception during reset or simillar'. Not sure how that happens.