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[Bug 1484738] [NEW] keyerror when refreshing instance security groups

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Public bug reported:

On a clean kilo install using source security groups I am seeing the
following trace on boot and delete


a2413f7] Deallocating network for instance _deallocate_network /usr/lib/python2.7/dist-packages/nova/compute/manager.py:2098
2015-08-14 09:46:06.688 11618 ERROR oslo_messaging.rpc.dispatcher [req-b8f44d34-96b2-4e40-ac22-15ccc6e44e59 - - - - -] Exception during message handling: 'metadata'
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher Traceback (most recent call last):
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     executor_callback))
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 186, in _dispatch
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     executor_callback)
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 130, in _do_dispatch
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     result = func(ctxt, **new_args)
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 6772, in refresh_instance_security_rules
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     return self.manager.refresh_instance_security_rules(ctxt, instance)
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 434, in decorated_function
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     args = (_load_instance(args[0]),) + args[1:]
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 425, in _load_instance
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     expected_attrs=metas)
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/objects/instance.py", line 506, in _from_db_object
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     instance['metadata'] = utils.instance_meta(db_inst)
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 817, in instance_meta
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     if isinstance(instance['metadata'], dict):
2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher KeyError: 'metadata'

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1484738

Title:
  keyerror when refreshing instance security groups

Status in OpenStack Compute (nova):
  New

Bug description:
  On a clean kilo install using source security groups I am seeing the
  following trace on boot and delete


  a2413f7] Deallocating network for instance _deallocate_network /usr/lib/python2.7/dist-packages/nova/compute/manager.py:2098
  2015-08-14 09:46:06.688 11618 ERROR oslo_messaging.rpc.dispatcher [req-b8f44d34-96b2-4e40-ac22-15ccc6e44e59 - - - - -] Exception during message handling: 'metadata'
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher Traceback (most recent call last):
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     executor_callback))
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 186, in _dispatch
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     executor_callback)
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 130, in _do_dispatch
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     result = func(ctxt, **new_args)
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 6772, in refresh_instance_security_rules
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     return self.manager.refresh_instance_security_rules(ctxt, instance)
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 434, in decorated_function
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     args = (_load_instance(args[0]),) + args[1:]
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 425, in _load_instance
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     expected_attrs=metas)
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/objects/instance.py", line 506, in _from_db_object
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     instance['metadata'] = utils.instance_meta(db_inst)
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 817, in instance_meta
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher     if isinstance(instance['metadata'], dict):
  2015-08-14 09:46:06.688 11618 TRACE oslo_messaging.rpc.dispatcher KeyError: 'metadata'

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