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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => liberty-3

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https://bugs.launchpad.net/bugs/1490011

Title:
  cells: test_create_ebs_image_and_check_boot fails intermittently

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  2015-08-28 18:41:12.128 | tempest.scenario.test_volume_boot_pattern.TestVolumeBootPatternV2.test_create_ebs_image_and_check_boot[compute,id-36c34c67-7b54-4b59-b188-02a2f458a63b,image,volume]
  2015-08-28 18:41:12.128 | --------------------------------------------------------------------------------------------------------------------------------------------------------------------
  2015-08-28 18:41:12.128 | 
  2015-08-28 18:41:12.128 | Captured traceback:
  2015-08-28 18:41:12.128 | ~~~~~~~~~~~~~~~~~~~
  2015-08-28 18:41:12.128 |     Traceback (most recent call last):
  2015-08-28 18:41:12.128 |       File "tempest/test.py", line 126, in wrapper
  2015-08-28 18:41:12.128 |         return f(self, *func_args, **func_kwargs)
  2015-08-28 18:41:12.128 |       File "tempest/scenario/test_volume_boot_pattern.py", line 194, in test_create_ebs_image_and_check_boot
  2015-08-28 18:41:12.128 |         instance = self.create_server(image=image['id'])
  2015-08-28 18:41:12.129 |       File "tempest/scenario/manager.py", line 177, in create_server
  2015-08-28 18:41:12.129 |         **create_kwargs)
  2015-08-28 18:41:12.129 |       File "tempest/services/compute/json/servers_client.py", line 86, in create_server
  2015-08-28 18:41:12.129 |         resp, body = self.post('servers', post_body)
  2015-08-28 18:41:12.129 |       File "/opt/stack/new/tempest/.tox/all/local/lib/python2.7/site-packages/tempest_lib/common/rest_client.py", line 256, in post
  2015-08-28 18:41:12.129 |         return self.request('POST', url, extra_headers, headers, body)
  2015-08-28 18:41:12.129 |       File "/opt/stack/new/tempest/.tox/all/local/lib/python2.7/site-packages/tempest_lib/common/rest_client.py", line 643, in request
  2015-08-28 18:41:12.129 |         resp, resp_body)
  2015-08-28 18:41:12.129 |       File "/opt/stack/new/tempest/.tox/all/local/lib/python2.7/site-packages/tempest_lib/common/rest_client.py", line 700, in _error_checker
  2015-08-28 18:41:12.129 |         raise exceptions.BadRequest(resp_body)
  2015-08-28 18:41:12.129 |     tempest_lib.exceptions.BadRequest: Bad request
  2015-08-28 18:41:12.130 |     Details: {u'code': 400, u'message': u'Block Device Mapping is Invalid: Boot sequence for the instance and image/block device mapping combination is not valid.'}

  as seen at http://logs.openstack.org/96/216696/6/check/gate-tempest-
  dsvm-cells/5304a42/console.html

  The cause appears to be a race with processing messages to
  create_or_update a bdm in the parent cell.  Rather than creating then
  updating the two messages both create due to the quickness with which
  they are sent and processed.  One solution is to send a create message
  and then an update.  A followup to enhance that would include adding a
  unique constraint so that two identical bdms can't be created.

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