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[Doug Hellmann <doug@xxxxxxxxxxxxxxxx>]

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

** Changed in: glance
    Milestone: None => liberty-1

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https://bugs.launchpad.net/bugs/1459015

Title:
  Tasks stuck in processing state when import to filesystem fails

Status in OpenStack Image Registry and Delivery Service (Glance):
  Fix Released

Bug description:
  In general, when a glance v2 task runs into an error during  the flow
  execution, the task gets stuck in the processing state. We are
  currently not marking the task as failed.

  I specifically ran into an issue where the import was failing due to a
  permission issue on the task.work_dir which was masked by the
  following exception :-

    File "/opt/stack/glance/glance/async/__init__.py", line 64, in begin_processing
      self._run(task_id, task.type)
    File "/opt/stack/glance/glance/async/taskflow_executor.py", line 133, in _run
      self.task_repo.save(task)
    File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 85, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/opt/stack/glance/glance/async/taskflow_executor.py", line 127, in _run
      engine.run()
    File "/usr/local/lib/python2.7/dist-packages/taskflow/engines/action_engine/engine.py", line 96, in run
      for _state in self.run_iter():
    File "/usr/local/lib/python2.7/dist-packages/taskflow/engines/action_engine/engine.py", line 146, in run_iter
      self._change_state(states.FAILURE)
    File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 85, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/usr/local/lib/python2.7/dist-packages/taskflow/engines/action_engine/engine.py", line 130, in run_iter
      failure.Failure.reraise_if_any(failures)
    File "/usr/local/lib/python2.7/dist-packages/taskflow/types/failure.py", line 244, in reraise_if_any
      failures[0].reraise()
    File "/usr/local/lib/python2.7/dist-packages/taskflow/types/failure.py", line 251, in reraise
      six.reraise(*self._exc_info)
    File "/usr/local/lib/python2.7/dist-packages/taskflow/engines/action_engine/executor.py", line 86, in _revert_task
      result = task.revert(**arguments)
    File "/opt/stack/glance/glance/async/flows/base_import.py", line 158, in revert
      if os.path.exists(result.split("file://")[-1]):
  AttributeError: 'Failure' object has no attribute 'split'

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