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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

Public bug reported:

Seen here:

http://logs.openstack.org/22/606122/7/check/openstack-tox-
py27/d70a4d5/testr_results.html.gz

ft1.7: nova.tests.unit.virt.libvirt.test_driver.LibvirtSnapshotTests.test_raw_with_rbd_clone_failure_does_cold_snapshot_StringException: pythonlogging:'': {{{
2018-11-30 16:46:13,885 WARNING [os_brick.initiator.connectors.remotefs] Connection details not present. RemoteFsClient may not initialize properly.
2018-11-30 16:46:13,888 INFO [nova.virt.libvirt.driver] Beginning live snapshot process
2018-11-30 16:46:13,889 WARNING [nova.virt.libvirt.driver] Performing standard snapshot because direct snapshot failed: Cannot determine the parent storage pool for 155d900f-4e14-4e4c-a73d-069cbf4541e6; cannot determine where to store images
2018-11-30 16:46:13,889 INFO [nova.virt.libvirt.driver] Snapshot extracted, beginning image upload
}}}

Traceback (most recent call last):
  File "/home/zuul/src/git.openstack.org/openstack/nova/.tox/py27/local/lib/python2.7/site-packages/mock/mock.py", line 1305, in patched
    return func(*args, **keywargs)
  File "nova/tests/unit/virt/libvirt/test_driver.py", line 22336, in test_raw_with_rbd_clone_failure_does_cold_snapshot
    recv_meta['id'], self.mock_update_task_state)
  File "nova/virt/libvirt/driver.py", line 1971, in snapshot
    with compute_utils.disk_ops_semaphore:
AttributeError: __exit__

Introduced with this change: https://review.openstack.org/#/c/609180/

http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22with%20compute_utils.disk_ops_semaphore%3A%5C%22%20AND%20tags%3A%5C%22console%5C%22&from=7d

22 hits, all failures, check and gate.

** Affects: nova
     Importance: High
         Status: Confirmed


** Tags: gate-failure testing

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https://bugs.launchpad.net/bugs/1806123

Title:
  i/o concurrency semaphore test changes are racy

Status in OpenStack Compute (nova):
  Confirmed

Bug description:
  Seen here:

  http://logs.openstack.org/22/606122/7/check/openstack-tox-
  py27/d70a4d5/testr_results.html.gz

  ft1.7: nova.tests.unit.virt.libvirt.test_driver.LibvirtSnapshotTests.test_raw_with_rbd_clone_failure_does_cold_snapshot_StringException: pythonlogging:'': {{{
  2018-11-30 16:46:13,885 WARNING [os_brick.initiator.connectors.remotefs] Connection details not present. RemoteFsClient may not initialize properly.
  2018-11-30 16:46:13,888 INFO [nova.virt.libvirt.driver] Beginning live snapshot process
  2018-11-30 16:46:13,889 WARNING [nova.virt.libvirt.driver] Performing standard snapshot because direct snapshot failed: Cannot determine the parent storage pool for 155d900f-4e14-4e4c-a73d-069cbf4541e6; cannot determine where to store images
  2018-11-30 16:46:13,889 INFO [nova.virt.libvirt.driver] Snapshot extracted, beginning image upload
  }}}

  Traceback (most recent call last):
    File "/home/zuul/src/git.openstack.org/openstack/nova/.tox/py27/local/lib/python2.7/site-packages/mock/mock.py", line 1305, in patched
      return func(*args, **keywargs)
    File "nova/tests/unit/virt/libvirt/test_driver.py", line 22336, in test_raw_with_rbd_clone_failure_does_cold_snapshot
      recv_meta['id'], self.mock_update_task_state)
    File "nova/virt/libvirt/driver.py", line 1971, in snapshot
      with compute_utils.disk_ops_semaphore:
  AttributeError: __exit__

  Introduced with this change: https://review.openstack.org/#/c/609180/

  http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22with%20compute_utils.disk_ops_semaphore%3A%5C%22%20AND%20tags%3A%5C%22console%5C%22&from=7d

  22 hits, all failures, check and gate.

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