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[Daniel Berrange <1403051@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

While running the nova.tests.unit.compute.test_compute unit test, I
noticed that it throws a lot of exceptions, which don't actually cause
the test suite to report failure. It appears that these are caused by
some periodic background task being executed. Such tasks should be
disabled in unit tests, as they'll often lead to non-deterministic
behaviour and/or failure.

Traceback (most recent call last):
  File "/home/berrange/src/cloud/nova/.venv/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 455, in fire_timers
    timer()
  File "/home/berrange/src/cloud/nova/.venv/lib/python2.7/site-packages/eventlet/hubs/timer.py", line 58, in __call__
    cb(*args, **kw)
  File "nova/utils.py", line 946, in wrapper
    return func(*args, **kwargs)
  File "nova/conductor/manager.py", line 651, in build_instances
    instance.uuid, request_spec)
  File "nova/scheduler/driver.py", line 67, in handle_schedule_error
    'task_state': None})
  File "nova/db/api.py", line 786, in instance_update_and_get_original
    columns_to_join=columns_to_join)
  File "nova/db/sqlalchemy/api.py", line 145, in wrapper
    return f(*args, **kwargs)
  File "nova/db/sqlalchemy/api.py", line 2408, in instance_update_and_get_original
    columns_to_join=columns_to_join)
  File "nova/db/sqlalchemy/api.py", line 183, in wrapped
    return f(*args, **kwargs)
  File "nova/db/sqlalchemy/api.py", line 2447, in _instance_update
    columns_to_join=columns_to_join)
  File "nova/db/sqlalchemy/api.py", line 1688, in _instance_get_by_uuid
    raise exception.InstanceNotFound(instance_id=uuid)
InstanceNotFound: Instance 3f41eea9-009f-47a6-91a8-9dd797c8f7dd could not be found.
Traceback (most recent call last):
  File "/home/berrange/src/cloud/nova/.venv/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 455, in fire_timers
    timer()
  File "/home/berrange/src/cloud/nova/.venv/lib/python2.7/site-packages/eventlet/hubs/timer.py", line 58, in __call__
    cb(*args, **kw)
  File "nova/utils.py", line 946, in wrapper
    return func(*args, **kwargs)
  File "nova/conductor/manager.py", line 651, in build_instances
    instance.uuid, request_spec)
  File "nova/scheduler/driver.py", line 67, in handle_schedule_error
    'task_state': None})
  File "nova/db/api.py", line 786, in instance_update_and_get_original
    columns_to_join=columns_to_join)
  File "nova/db/sqlalchemy/api.py", line 145, in wrapper
    return f(*args, **kwargs)
  File "nova/db/sqlalchemy/api.py", line 2408, in instance_update_and_get_original
    columns_to_join=columns_to_join)
  File "nova/db/sqlalchemy/api.py", line 183, in wrapped
    return f(*args, **kwargs)
  File "nova/db/sqlalchemy/api.py", line 2447, in _instance_update
    columns_to_join=columns_to_join)
  File "nova/db/sqlalchemy/api.py", line 1688, in _instance_get_by_uuid
    raise exception.InstanceNotFound(instance_id=uuid)

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1403051

Title:
  periodic task runs during nova.tests.unit.compute.test_compute unit
  test

Status in OpenStack Compute (Nova):
  New

Bug description:
  While running the nova.tests.unit.compute.test_compute unit test, I
  noticed that it throws a lot of exceptions, which don't actually cause
  the test suite to report failure. It appears that these are caused by
  some periodic background task being executed. Such tasks should be
  disabled in unit tests, as they'll often lead to non-deterministic
  behaviour and/or failure.

  Traceback (most recent call last):
    File "/home/berrange/src/cloud/nova/.venv/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 455, in fire_timers
      timer()
    File "/home/berrange/src/cloud/nova/.venv/lib/python2.7/site-packages/eventlet/hubs/timer.py", line 58, in __call__
      cb(*args, **kw)
    File "nova/utils.py", line 946, in wrapper
      return func(*args, **kwargs)
    File "nova/conductor/manager.py", line 651, in build_instances
      instance.uuid, request_spec)
    File "nova/scheduler/driver.py", line 67, in handle_schedule_error
      'task_state': None})
    File "nova/db/api.py", line 786, in instance_update_and_get_original
      columns_to_join=columns_to_join)
    File "nova/db/sqlalchemy/api.py", line 145, in wrapper
      return f(*args, **kwargs)
    File "nova/db/sqlalchemy/api.py", line 2408, in instance_update_and_get_original
      columns_to_join=columns_to_join)
    File "nova/db/sqlalchemy/api.py", line 183, in wrapped
      return f(*args, **kwargs)
    File "nova/db/sqlalchemy/api.py", line 2447, in _instance_update
      columns_to_join=columns_to_join)
    File "nova/db/sqlalchemy/api.py", line 1688, in _instance_get_by_uuid
      raise exception.InstanceNotFound(instance_id=uuid)
  InstanceNotFound: Instance 3f41eea9-009f-47a6-91a8-9dd797c8f7dd could not be found.
  Traceback (most recent call last):
    File "/home/berrange/src/cloud/nova/.venv/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 455, in fire_timers
      timer()
    File "/home/berrange/src/cloud/nova/.venv/lib/python2.7/site-packages/eventlet/hubs/timer.py", line 58, in __call__
      cb(*args, **kw)
    File "nova/utils.py", line 946, in wrapper
      return func(*args, **kwargs)
    File "nova/conductor/manager.py", line 651, in build_instances
      instance.uuid, request_spec)
    File "nova/scheduler/driver.py", line 67, in handle_schedule_error
      'task_state': None})
    File "nova/db/api.py", line 786, in instance_update_and_get_original
      columns_to_join=columns_to_join)
    File "nova/db/sqlalchemy/api.py", line 145, in wrapper
      return f(*args, **kwargs)
    File "nova/db/sqlalchemy/api.py", line 2408, in instance_update_and_get_original
      columns_to_join=columns_to_join)
    File "nova/db/sqlalchemy/api.py", line 183, in wrapped
      return f(*args, **kwargs)
    File "nova/db/sqlalchemy/api.py", line 2447, in _instance_update
      columns_to_join=columns_to_join)
    File "nova/db/sqlalchemy/api.py", line 1688, in _instance_get_by_uuid
      raise exception.InstanceNotFound(instance_id=uuid)

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