** Changed in: oslo.messaging
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1393320

Title:
  Juno: Nova compute service cant connect to AMQP server through qpidd
  whereas there is no issue working with rabbitmq

Status in OpenStack Compute (Nova):
  Invalid
Status in Messaging API for OpenStack:
  Invalid

Bug description:
  I am using qpidd instead of rabbitmq in nova-compute and controller
  node. While starting nova-compute service i see these errors in the
  nova-compute log.

  {
  2014-11-11 12:17:32.844 5214 DEBUG nova.openstack.common.lockutils [-] 
Semaphore / lock released "_update_available_resource" inner 
/opt/stack/nova/nova/openstack/common/lockutils.py:275
  Traceback (most recent call last):
    File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/poll.py", line 
115, in wait
      listener.cb(fileno)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/green/select.py", 
line 52, in on_read
      current.switch(([original], [], []))
    File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 
212, in main
      result = function(*args, **kwargs)
    File "/opt/stack/nova/nova/openstack/common/service.py", line 490, in 
run_service
      service.start()
    File "/opt/stack/nova/nova/service.py", line 181, in start
      self.manager.pre_start_hook()
    File "/opt/stack/nova/nova/compute/manager.py", line 1152, in pre_start_hook
      self.update_available_resource(nova.context.get_admin_context())
    File "/opt/stack/nova/nova/compute/manager.py", line 5964, in 
update_available_resource
      use_slave=True)
    File "/opt/stack/nova/nova/compute/manager.py", line 5975, in 
_get_compute_nodes_in_db
      use_slave=use_slave)
    File "/opt/stack/nova/nova/objects/base.py", line 153, in wrapper
      args, kwargs)
    File "/opt/stack/nova/nova/conductor/rpcapi.py", line 346, in 
object_class_action
      objver=objver, args=args, kwargs=kwargs)
    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/client.py", line 
150, in call
      wait_for_reply=True, timeout=timeout)
    File "/usr/lib/python2.7/dist-packages/oslo/messaging/transport.py", line 
90, in _send
      timeout=timeout)
    File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 
412, in send
      return self._send(target, ctxt, message, wait_for_reply, timeout)
    File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 
405, in _send
      raise result
  IncompatibleObjectVersion_Remote: Version 1.4 of Service is not supported
  Traceback (most recent call last):

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 133, in _dispatch_and_reply
      incoming.message))

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 176, in _dispatch
      return self._do_dispatch(endpoint, method, ctxt, args)

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 122, in _do_dispatch
      result = getattr(endpoint, method)(ctxt, **new_args)

    File "/opt/stack/nova/nova/conductor/manager.py", line 1043, in
  object_class_action

    File "/opt/stack/nova/nova/conductor/manager.py", line 605, in 
object_class_action
      for t in requested_networks])

    File "/opt/stack/nova/nova/objects/base.py", line 224, in
  obj_class_from_name

  IncompatibleObjectVersion: Version 1.4 of Service is not supported

  Removing descriptor: 7
  2014-11-11 12:17:32.897 5214 ERROR nova.openstack.common.threadgroup [-] 
Version 1.4 of Service is not supported
  Traceback (most recent call last):

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 133, in _dispatch_and_reply
      incoming.message))

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 176, in _dispatch
      return self._do_dispatch(endpoint, method, ctxt, args)

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 122, in _do_dispatch
      result = getattr(endpoint, method)(ctxt, **new_args)

    File "/opt/stack/nova/nova/conductor/manager.py", line 1043, in
  object_class_action

    File "/opt/stack/nova/nova/conductor/manager.py", line 605, in 
object_class_action
      for t in requested_networks])

    File "/opt/stack/nova/nova/objects/base.py", line 224, in
  obj_class_from_name

  IncompatibleObjectVersion: Version 1.4 of Service is not supported
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup 
Traceback (most recent call last):
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/openstack/common/threadgroup.py", line 125, in wait
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
x.wait()
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/openstack/common/threadgroup.py", line 47, in wait
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
return self.thread.wait()
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 173, in 
wait
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
return self._exit_event.wait()
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/local/lib/python2.7/dist-packages/eventlet/event.py", line 121, in wait
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
return hubs.get_hub().switch()
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/local/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 293, in 
switch
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
return self.greenlet.switch()
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 212, in 
main
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
result = function(*args, **kwargs)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/openstack/common/service.py", line 490, in run_service
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
service.start()
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/service.py", line 181, in start
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
self.manager.pre_start_hook()
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/compute/manager.py", line 1152, in pre_start_hook
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
self.update_available_resource(nova.context.get_admin_context())
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/compute/manager.py", line 5964, in 
update_available_resource
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
use_slave=True)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/compute/manager.py", line 5975, in 
_get_compute_nodes_in_db
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
use_slave=use_slave)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/objects/base.py", line 153, in wrapper
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
args, kwargs)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/conductor/rpcapi.py", line 346, in object_class_action
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
objver=objver, args=args, kwargs=kwargs)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/client.py", line 150, in 
call
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
wait_for_reply=True, timeout=timeout)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/transport.py", line 90, in 
_send
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
timeout=timeout)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 
412, in send
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
return self._send(target, ctxt, message, wait_for_reply, timeout)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 
405, in _send
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
raise result
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup 
IncompatibleObjectVersion_Remote: Version 1.4 of Service is not supported
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup 
Traceback (most recent call last):
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 133, 
in _dispatch_and_reply
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
incoming.message))
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 176, 
in _dispatch
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
return self._do_dispatch(endpoint, method, ctxt, args)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 122, 
in _do_dispatch
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     
result = getattr(endpoint, method)(ctxt, **new_args)
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/conductor/manager.py", line 1043, in object_class_action
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/conductor/manager.py", line 605, in object_class_action
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup     for 
t in requested_networks])
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/objects/base.py", line 224, in obj_class_from_name
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup

  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup 
IncompatibleObjectVersion: Version 1.4 of Service is not supported
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:17:32.897 5214 TRACE nova.openstack.common.threadgroup

  }

  {
  2014-11-11 12:52:22.670 11938 DEBUG nova.virt.libvirt.driver [-] Starting 
green dispatch thread _init_events 
/opt/stack/nova/nova/virt/libvirt/driver.py:668
  Traceback (most recent call last):
    File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/poll.py", line 
115, in wait
      listener.cb(fileno)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/green/select.py", 
line 52, in on_read
      current.switch(([original], [], []))
    File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 
212, in main
      result = function(*args, **kwargs)
    File "/opt/stack/nova/nova/openstack/common/service.py", line 490, in 
run_service
      service.start()
    File "/opt/stack/nova/nova/service.py", line 164, in start
      self.manager.init_host()
    File "/opt/stack/nova/nova/compute/manager.py", line 1128, in init_host
      context, self.host, expected_attrs=['info_cache'])
    File "/opt/stack/nova/nova/objects/base.py", line 153, in wrapper
      args, kwargs)
    File "/opt/stack/nova/nova/conductor/rpcapi.py", line 346, in 
object_class_action
      objver=objver, args=args, kwargs=kwargs)
    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/client.py", line 
150, in call
      wait_for_reply=True, timeout=timeout)
    File "/usr/lib/python2.7/dist-packages/oslo/messaging/transport.py", line 
90, in _send
      timeout=timeout)
    File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 
412, in send
      return self._send(target, ctxt, message, wait_for_reply, timeout)
    File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 
405, in _send
      raise result
  IncompatibleObjectVersion_Remote: Version 1.9 of InstanceList is not supported
  Traceback (most recent call last):

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 133, in _dispatch_and_reply
      incoming.message))

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 176, in _dispatch
      return self._do_dispatch(endpoint, method, ctxt, args)

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 122, in _do_dispatch
    File "/opt/stack/nova/nova/conductor/manager.py", line 1043, in 
object_class_action

    File "/opt/stack/nova/nova/conductor/manager.py", line 605, in 
object_class_action
      for t in requested_networks])

    File "/opt/stack/nova/nova/objects/base.py", line 224, in
  obj_class_from_name

  IncompatibleObjectVersion: Version 1.9 of InstanceList is not
  supported

  Removing descriptor: 7
  2014-11-11 12:52:22.798 11938 ERROR nova.openstack.common.threadgroup [-] 
Version 1.9 of InstanceList is not supported
  Traceback (most recent call last):

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 133, in _dispatch_and_reply
      incoming.message))

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 176, in _dispatch
      return self._do_dispatch(endpoint, method, ctxt, args)

    File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", 
line 122, in _do_dispatch
      result = getattr(endpoint, method)(ctxt, **new_args)

    File "/opt/stack/nova/nova/conductor/manager.py", line 1043, in
  object_class_action

    File "/opt/stack/nova/nova/conductor/manager.py", line 605, in 
object_class_action
      for t in requested_networks])

    File "/opt/stack/nova/nova/objects/base.py", line 224, in
  obj_class_from_name

  IncompatibleObjectVersion: Version 1.9 of InstanceList is not supported
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup 
Traceback (most recent call last):
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/openstack/common/threadgroup.py", line 125, in wait
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
x.wait()
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/openstack/common/threadgroup.py", line 47, in wait
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
return self.thread.wait()
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 173, in 
wait
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
return self._exit_event.wait()
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/local/lib/python2.7/dist-packages/eventlet/event.py", line 121, in wait
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
return hubs.get_hub().switch()
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/local/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 293, in 
switch
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
return self.greenlet.switch()
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 212, in 
main
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
result = function(*args, **kwargs)
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/openstack/common/service.py", line 490, in run_service
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
service.start()
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/service.py", line 164, in start
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
self.manager.init_host()
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/compute/manager.py", line 1128, in init_host
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
context, self.host, expected_attrs=['info_cache'])
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/objects/base.py", line 153, in wrapper
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
args, kwargs)
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/conductor/rpcapi.py", line 346, in object_class_action
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
objver=objver, args=args, kwargs=kwargs)
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/client.py", line 150, in 
call
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
wait_for_reply=True, timeout=timeout)
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/transport.py", line 90, in 
_send
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
timeout=timeout)
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 
412, in send
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
return self._send(target, ctxt, message, wait_for_reply, timeout)
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 
405, in _send
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
raise result
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup 
IncompatibleObjectVersion_Remote: Version 1.9 of InstanceList is not supported
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup 
Traceback (most recent call last):
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 133, 
in _dispatch_and_reply
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
incoming.message))
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 176, 
in _dispatch
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
return self._do_dispatch(endpoint, method, ctxt, args)
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 122, 
in _do_dispatch
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     
result = getattr(endpoint, method)(ctxt, **new_args)
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/conductor/manager.py", line 1043, in object_class_action
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/conductor/manager.py", line 605, in object_class_action
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup     for 
t in requested_networks])
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup   File 
"/opt/stack/nova/nova/objects/base.py", line 224, in obj_class_from_name
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup 
IncompatibleObjectVersion: Version 1.9 of InstanceList is not supported
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup
  2014-11-11 12:52:22.798 11938 TRACE nova.openstack.common.threadgroup
  stack@compute11:/home/admin1/devstack_integ/devstack_juno/devstack$
  stack@compute11:/home/admin1/devstack_integ/devstack_juno/devstack$
                                                                        
  }

  Whereas if i use rabbitmq-server the nova-compute is not having the
  above errors.

  Chandralekha

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