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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

** Changed in: nova
       Status: New => Confirmed

** Also affects: nova/newton
   Importance: Undecided
       Status: New

** Also affects: nova/ocata
   Importance: Undecided
       Status: New

** Changed in: nova/newton
       Status: New => Confirmed

** Changed in: nova/ocata
       Status: New => Confirmed

-- 
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1709236

Title:
  Live migration failed in openstack on xenserver using microversion
  2.34

Status in OpenStack Compute (nova):
  Confirmed
Status in OpenStack Compute (nova) newton series:
  Confirmed
Status in OpenStack Compute (nova) ocata series:
  Confirmed

Bug description:
  XenServer live migration is broken with the latest NOVA API. At least
  it works well when using Nova API 2.27.

  See the following trace where it reports error with "Action for
  request_id req-a06c9561-0458-43c6-b767-08bf67e38b07 on instance
  8a8ed9ad-2fb8-46d4-bee2-9d947e2d3e58 not found"

  
  ul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server [None req-a06c9561-0458-43c6-b767-08bf67e38b07 admin admin] Exception during message handling: InstanceActionNotFound: Action for request_id req-a06c9561-0458-43c6-b767-08bf67e38b07 on instance 8a8ed9ad-2fb8-46d4-bee2-9d947e2d3e58 not found
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server Traceback (most recent call last):
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 160, in _process_incoming
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     res = self.dispatcher.dispatch(message)
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 213, in dispatch
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     return self._do_dispatch(endpoint, method, ctxt, args)
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 183, in _do_dispatch
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     result = func(ctxt, **new_args)
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/opt/stack/nova/nova/compute/utils.py", line 863, in decorated_function
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     with EventReporter(context, event_name, instance_uuid):
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/opt/stack/nova/nova/compute/utils.py", line 834, in __enter__
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     self.context, uuid, self.event_name, want_result=False)
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 184, in wrapper
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     result = fn(cls, context, *args, **kwargs)
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/opt/stack/nova/nova/objects/instance_action.py", line 169, in event_start
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     db_event = db.action_event_start(context, values)
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/opt/stack/nova/nova/db/api.py", line 1958, in action_event_start
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     return IMPL.action_event_start(context, values)
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/opt/stack/nova/nova/db/sqlalchemy/api.py", line 250, in wrapped
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     return f(context, *args, **kwargs)
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server   File "/opt/stack/nova/nova/db/sqlalchemy/api.py", line 6155, in action_event_start
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server     instance_uuid=values['instance_uuid'])
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server InstanceActionNotFound: Action for request_id req-a06c9561-0458-43c6-b767-08bf67e38b07 on instance 8a8ed9ad-2fb8-46d4-bee2-9d947e2d3e58 not found
  Jul 27 01:57:12 DevStackOSDomU nova-conductor[2134]: ERROR oslo_messaging.rpc.server

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