[Bug 1566136] Re: Mitaka ironic-conductor error on stop: Cannot switch to MAINLOOP from MAINLOOP

[Matt Fischer]

This was from work on a side project, I no longer have the setup so feel
free to close it.

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Title:
  Mitaka ironic-conductor error on stop: Cannot switch to MAINLOOP from
  MAINLOOP

Status in Ironic:
  Incomplete
Status in Ironic mitaka series:
  Incomplete
Status in ironic package in Ubuntu:
  New

Bug description:
  Using the mitaka packages from trusty/proposed:

  ii  ironic-api                       1:5.1.0-0ubuntu1~cloud0               all          Openstack bare metal provisioning service - API
  ii  ironic-common                    1:5.1.0-0ubuntu1~cloud0               all          Openstack bare metal provisioning service - daemons
  ii  ironic-conductor                 1:5.1.0-0ubuntu1~cloud0               all          Openstack bare metal provisioning service - conductor
  ii  python-ironic                    1:5.1.0-0ubuntu1~cloud0               all          Openstack bare metal provisioning service - Python library
  ii  python-ironic-lib                1.1.0-1~cloud0                        all          common library used by various Ironic projects - Python 2.7
  ii  python-ironicclient              1.2.0-0ubuntu1~cloud0                 all          Client for OpenStack bare metal Service - Python 2.7

  I'm not sure what's going on but conductor is throwing this when
  stopping:

  However it is actually no longer running:

  
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service [-] Service error occurred when stopping the RPC server. Error: Cannot switch to MAINLOOP from MAINLOOP
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service Traceback (most recent call last):
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service   File "/usr/lib/python2.7/dist-packages/ironic/common/service.py", line 93, in stop
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service     self.rpcserver.wait()
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service   File "/usr/lib/python2.7/dist-packages/oslo_messaging/server.py", line 267, in wrapper
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service     log_after, timeout_timer)
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service   File "/usr/lib/python2.7/dist-packages/oslo_messaging/server.py", line 187, in run_once
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service     post_fn = fn()
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service   File "/usr/lib/python2.7/dist-packages/oslo_messaging/server.py", line 266, in <lambda>
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service     states[state].run_once(lambda: fn(self, *args, **kwargs),
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service   File "/usr/lib/python2.7/dist-packages/oslo_messaging/server.py", line 445, in wait
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service     self._poll_executor.shutdown(wait=True)
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service   File "/usr/lib/python2.7/dist-packages/futurist/_futures.py", line 411, in shutdown
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service     self._pool.waitall()
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service   File "/usr/lib/python2.7/dist-packages/eventlet/greenpool.py", line 120, in waitall
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service     self.no_coros_running.wait()
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service   File "/usr/lib/python2.7/dist-packages/eventlet/event.py", line 121, in wait
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service     return hubs.get_hub().switch()
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service   File "/usr/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 280, in switch
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service     assert cur is not self.greenlet, 'Cannot switch to MAINLOOP from MAINLOOP'
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service AssertionError: Cannot switch to MAINLOOP from MAINLOOP
  2016-04-05 04:27:42.089 8920 ERROR ironic.common.service

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