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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

Public bug reported:

http://logs.openstack.org/17/483917/1/check/gate-nova-tox-functional-
ubuntu-xenial/f92a89d/console.html#_2017-07-14_13_14_22_687228

2017-07-14 13:14:22.687228 | nova.tests.functional.notification_sample_tests.test_instance.TestInstanceNotificationSample.test_volume_swap_server
2017-07-14 13:14:22.687273 | --------------------------------------------------------------------------------------------------------------------
2017-07-14 13:14:22.687286 | 
2017-07-14 13:14:22.687304 | Captured traceback:
2017-07-14 13:14:22.687322 | ~~~~~~~~~~~~~~~~~~~
2017-07-14 13:14:22.687345 |     Traceback (most recent call last):
2017-07-14 13:14:22.687388 |       File "nova/tests/functional/notification_sample_tests/test_instance.py", line 837, in test_volume_swap_server
2017-07-14 13:14:22.687419 |         self.assertEqual(7, len(fake_notifier.VERSIONED_NOTIFICATIONS))
2017-07-14 13:14:22.687479 |       File "/home/jenkins/workspace/gate-nova-tox-functional-ubuntu-xenial/.tox/functional/local/lib/python2.7/site-packages/testtools/testcase.py", line 411, in assertEqual
2017-07-14 13:14:22.687507 |         self.assertThat(observed, matcher, message)
2017-07-14 13:14:22.687565 |       File "/home/jenkins/workspace/gate-nova-tox-functional-ubuntu-xenial/.tox/functional/local/lib/python2.7/site-packages/testtools/testcase.py", line 498, in assertThat
2017-07-14 13:14:22.687586 |         raise mismatch_error
2017-07-14 13:14:22.687611 |     testtools.matchers._impl.MismatchError: 7 != 6

This could be due to the recent change in the CinderFixture here:

https://review.openstack.org/#/c/448779/

We need the dump the notifications in the error message to get context
when this fails to debug it.

** Affects: nova
     Importance: Undecided
         Status: Confirmed


** Tags: notifications testing

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https://bugs.launchpad.net/bugs/1704392

Title:
  TestInstanceNotificationSample.test_volume_swap_server fails with
  "testtools.matchers._impl.MismatchError: 7 != 6"

Status in OpenStack Compute (nova):
  Confirmed

Bug description:
  http://logs.openstack.org/17/483917/1/check/gate-nova-tox-functional-
  ubuntu-xenial/f92a89d/console.html#_2017-07-14_13_14_22_687228

  2017-07-14 13:14:22.687228 | nova.tests.functional.notification_sample_tests.test_instance.TestInstanceNotificationSample.test_volume_swap_server
  2017-07-14 13:14:22.687273 | --------------------------------------------------------------------------------------------------------------------
  2017-07-14 13:14:22.687286 | 
  2017-07-14 13:14:22.687304 | Captured traceback:
  2017-07-14 13:14:22.687322 | ~~~~~~~~~~~~~~~~~~~
  2017-07-14 13:14:22.687345 |     Traceback (most recent call last):
  2017-07-14 13:14:22.687388 |       File "nova/tests/functional/notification_sample_tests/test_instance.py", line 837, in test_volume_swap_server
  2017-07-14 13:14:22.687419 |         self.assertEqual(7, len(fake_notifier.VERSIONED_NOTIFICATIONS))
  2017-07-14 13:14:22.687479 |       File "/home/jenkins/workspace/gate-nova-tox-functional-ubuntu-xenial/.tox/functional/local/lib/python2.7/site-packages/testtools/testcase.py", line 411, in assertEqual
  2017-07-14 13:14:22.687507 |         self.assertThat(observed, matcher, message)
  2017-07-14 13:14:22.687565 |       File "/home/jenkins/workspace/gate-nova-tox-functional-ubuntu-xenial/.tox/functional/local/lib/python2.7/site-packages/testtools/testcase.py", line 498, in assertThat
  2017-07-14 13:14:22.687586 |         raise mismatch_error
  2017-07-14 13:14:22.687611 |     testtools.matchers._impl.MismatchError: 7 != 6

  This could be due to the recent change in the CinderFixture here:

  https://review.openstack.org/#/c/448779/

  We need the dump the notifications in the error message to get context
  when this fails to debug it.

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https://bugs.launchpad.net/nova/+bug/1704392/+subscriptions