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[Chuck Short <chuck.short@xxxxxxxxxxxxx>]

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

** Changed in: nova/kilo
    Milestone: None => 2015.1.2

** Changed in: nova/kilo
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1494653

Title:
  Remove unnecessary 'context' parameter from quotas reserve method call

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) kilo series:
  Fix Committed

Bug description:
  In patch [1] 'context' parameter was removed from quota-related remotable method signatures.
  In patch [2] use of 'context' parameter was removed from quota-related remotable method calls.

  Still there are some occurrances where 'context' parameter is passed
  to quotas.reserve method which is leading to error "ValueError:
  Circular reference detected".

  For eg: while restarting nova-compute if there are any instance
  whose vm_state is 'DELETED' but that instance is not marked as deleted in db. In that case, while calling _init_instance method it raises below error.

  2015-09-08 00:36:34.133 ERROR nova.compute.manager [req-3222b8a4-0542-48cf-a2e1-c92e5fd91e5e None None] [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] Failed to complete a deletion
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] Traceback (most recent call last):
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/opt/stack/nova/nova/compute/manager.py", line 952, in _init_instance
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] self._complete_partial_deletion(context, instance)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/opt/stack/nova/nova/compute/manager.py", line 879, in _complete_partial_d
  eletion
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", lin
  e 197, in wrapper
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] ctxt, self, fn.__name__, args, kwargs)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/opt/stack/nova/nova/conductor/rpcapi.py", line 246, in object_action
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] objmethod=objmethod, args=args, kwargs=kwargs)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 158, in call
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] retry=self.retry)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 90, in _send
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] timeout=timeout, retry=retry)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 431, in send
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] retry=retry)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 399, in _send
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] msg = rpc_common.serialize_msg(msg)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/common.py", line 286, in serialize_msg
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] _MESSAGE_KEY: jsonutils.dumps(raw_msg)}
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/local/lib/python2.7/dist-packages/oslo_serialization/jsonutils.py", line 185, in dumps
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] return json.dumps(obj, default=default, **kwargs)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/lib/python2.7/json/__init__.py", line 250, in dumps
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] sort_keys=sort_keys, **kw).encode(obj)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/lib/python2.7/json/encoder.py", line 207, in encode
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] chunks = self.iterencode(o, _one_shot=True)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] File "/usr/lib/python2.7/json/encoder.py", line 270, in iterencode
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] return _iterencode(o, 0)
  2015-09-08 00:36:34.133 TRACE nova.compute.manager [instance: 00c7a9ae-bff1-461f-ab95-0e8f15327536] ValueError: Circular reference detected

  [1] https://review.openstack.org/#/c/164268/
  [2] https://review.openstack.org/#/c/160499/

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