[Bug 1580144] Re: heat-engine fails to terminate worker processes

[James Page]

*** This bug is a duplicate of bug 1562042 ***
    https://bugs.launchpad.net/bugs/1562042

Might be a dupe of bug 1562042

** This bug has been marked a duplicate of bug 1562042
   Traceback in error log during heat-engine service shutdown

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https://bugs.launchpad.net/bugs/1580144

Title:
  heat-engine fails to terminate worker processes

Status in heat package in Ubuntu:
  New

Bug description:
  We've seen this a few times in testing - specifically impacts upstart
  managed heat-engine; systemd does a better job of cleaning up the
  failure.

  2016-05-10 09:20:02.923 19107 ERROR heat.engine.service [-] Failed to stop engine service, 'NoneType' object has no attribute 'stop'
  2016-05-10 09:20:02.924 19106 ERROR heat.engine.service [-] Failed to stop engine service, 'NoneType' object has no attribute 'stop'
  2016-05-10 09:20:02.925 19104 ERROR heat.engine.service [-] Failed to stop engine service, 'NoneType' object has no attribute 'stop'
  2016-05-10 09:20:02.925 19105 ERROR heat.engine.service [-] Failed to stop engine service, 'NoneType' object has no attribute 'stop'
  2016-05-10 09:20:02.978 18804 INFO oslo_service.service [-] Caught SIGTERM, stopping children
  2016-05-10 09:20:02.979 18804 ERROR heat.engine.service [-] Failed to stop engine service, 'NoneType' object has no attribute 'stop'
  2016-05-10 09:20:02.980 18804 CRITICAL heat-engine [-] AttributeError: 'NoneType' object has no attribute 'groups'
  2016-05-10 09:20:02.980 18804 ERROR heat-engine Traceback (most recent call last):
  2016-05-10 09:20:02.980 18804 ERROR heat-engine   File "/usr/bin/heat-engine", line 10, in <module>
  2016-05-10 09:20:02.980 18804 ERROR heat-engine     sys.exit(main())
  2016-05-10 09:20:02.980 18804 ERROR heat-engine   File "/usr/lib/python2.7/dist-packages/heat/cmd/engine.py", line 79, in main
  2016-05-10 09:20:02.980 18804 ERROR heat-engine     launcher.wait()
  2016-05-10 09:20:02.980 18804 ERROR heat-engine   File "/usr/lib/python2.7/dist-packages/oslo_service/service.py", line 577, in wait
  2016-05-10 09:20:02.980 18804 ERROR heat-engine     self.stop()
  2016-05-10 09:20:02.980 18804 ERROR heat-engine   File "/usr/lib/python2.7/dist-packages/oslo_service/service.py", line 586, in stop
  2016-05-10 09:20:02.980 18804 ERROR heat-engine     service.stop()
  2016-05-10 09:20:02.980 18804 ERROR heat-engine   File "/usr/lib/python2.7/dist-packages/osprofiler/profiler.py", line 117, in wrapper
  2016-05-10 09:20:02.980 18804 ERROR heat-engine     return f(*args, **kwargs)
  2016-05-10 09:20:02.980 18804 ERROR heat-engine   File "/usr/lib/python2.7/dist-packages/heat/engine/service.py", line 426, in stop
  2016-05-10 09:20:02.980 18804 ERROR heat-engine     for stack_id in list(self.thread_group_mgr.groups.keys()):
  2016-05-10 09:20:02.980 18804 ERROR heat-engine AttributeError: 'NoneType' object has no attribute 'groups'
  2016-05-10 09:20:02.980 18804 ERROR heat-engine
  2016-05-10 09:20:03.106 19104 INFO oslo_service.service [-] Parent process has died unexpectedly, exiting
  2016-05-10 09:20:03.108 19106 INFO oslo_service.service [-] Parent process has died unexpectedly, exiting
  2016-05-10 09:20:03.108 19107 INFO oslo_service.service [-] Parent process has died unexpectedly, exiting
  2016-05-10 09:20:03.109 19105 INFO oslo_service.service [-] Parent process has died unexpectedly, exiting
  2016-05-10 09:20:03.110 19104 ERROR heat.engine.service [-] Failed to stop engine service, 'NoneType' object has no attribute 'stop'
  2016-05-10 09:20:03.111 19107 ERROR heat.engine.service [-] Failed to stop engine service, 'NoneType' object has no attribute 'stop'
  2016-05-10 09:20:03.112 19105 ERROR heat.engine.service [-] Failed to stop engine service, 'NoneType' object has no attribute 'stop'
  2016-05-10 09:20:03.115 19106 ERROR heat.engine.service [-] Failed to stop engine service, 'NoneType' object has no attribute 'stop'

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