ListServersNegativeV3Test.test_list_servers_by_changes_since appears to be racey causing failures

[Jay Bryant]

I encountered the following failure in the Gate today for a test run against a Cinder change:

2014-05-30 20:08:34.161 | {0} tempest.api.compute.v3.servers.test_list_servers_negative.ListServersNegativeV3Test.test_list_servers_by_changes_since [0.052455s] ... FAILED
2014-05-30 20:08:34.161 |
2014-05-30 20:08:34.161 | Captured traceback:
2014-05-30 20:08:34.161 | ~~~~~~~~~~~~~~~~~~~
2014-05-30 20:08:34.161 | Traceback (most recent call last):
2014-05-30 20:08:34.161 | File "tempest/api/compute/v3/servers/test_list_servers_negative.py", line 140, in test_list_servers_by_changes_since
2014-05-30 20:08:34.161 | (num_expected, body['servers']))
2014-05-30 20:08:34.161 | File "/usr/local/lib/python2.7/dist-packages/testtools/testcase.py", line 321, in assertEqual
2014-05-30 20:08:34.161 | self.assertThat(observed, matcher, message)
2014-05-30 20:08:34.161 | File "/usr/local/lib/python2.7/dist-packages/testtools/testcase.py", line 406, in assertThat
2014-05-30 20:08:34.162 | raise mismatch_error
2014-05-30 20:08:34.162 | MismatchError: 3 != 1: Number of servers 3 is wrong in [{u'id': u'04dd926d-6cbf-4626-9a83-372852d1da9d', u'links': [{u'href': u'http://127.0.0.1:8774/v3/servers/04dd926d-6cbf-4626-9a83-372852d1da9d', u'rel': u'self'}, {u'href': u'http://127.0.0.1:8774/servers/04dd926d-6cbf-4626-9a83-372852d1da9d', u'rel': u'bookmark'}], u'name': u'ListServersNegativeV3Test-instance-954892925'}]
2014-05-30 20:08:34.162 |
2014-05-30 20:08:34.162 |
2014-05-30 20:08:34.162 | Captured pythonlogging:
2014-05-30 20:08:34.162 | ~~~~~~~~~~~~~~~~~~~~~~~
2014-05-30 20:08:34.162 | 2014-05-30 20:08:34,137 Request (ListServersNegativeV3Test:test_list_servers_by_changes_since): 200 GET http://127.0.0.1:8774/v3/servers?changes_since=2014-05-30T20%3A08%3A32.169807 0.045s
2014-05-30 20:08:34.162 |

It appears to be similar to https://bugs.launchpad.net/tempest/+bug/1195309

[Ken'ichi Ohmichi (oomichi)]

This bug is duplicated to https://bugs.launchpad.net/nova/+bug/1254238 , and we are trying to fix it.