Attached volumes migration fails due to swap volume

[Vincent Hou]

In cinder, when try to migrate an attached volume. The n-cpu reports the error:

=========================================n-cpu=====================================================
2015-04-16 17:35:30.581 ERROR root [req-cf02b6cd-4bd7-4e59-986b-278596cec0a6 admin admin] Original exception being dropped: ['Tracebac
k (most recent call last):\n', ' File "/opt/stack/nova/nova/compute/manager.py", line 340, in decorated_function\n return function
(self, context, *args, **kwargs)\n', ' File "/opt/stack/nova/nova/compute/manager.py", line 4939, in swap_volume\n context, old_vo
lume_id, instance_uuid=instance.uuid)\n', "AttributeError: 'unicode' object has no attribute 'uuid'\n"]
2015-04-16 17:35:31.043 ERROR root [req-cf02b6cd-4bd7-4e59-986b-278596cec0a6 admin admin] Original exception being dropped: ['Tracebac
k (most recent call last):\n', ' File "/opt/stack/nova/nova/compute/manager.py", line 295, in decorated_function\n return function
(self, context, *args, **kwargs)\n', ' File "/opt/stack/nova/nova/compute/manager.py", line 352, in decorated_function\n kwargs[\'
instance\'], e, sys.exc_info())\n', ' File "/opt/stack/nova/nova/compute/utils.py", line 87, in add_instance_fault_from_exc\n faul
t_obj.instance_uuid = instance.uuid\n', "AttributeError: 'unicode' object has no attribute 'uuid'\n"]
2015-04-16 17:35:31.046 ERROR oslo_messaging.rpc.dispatcher [req-cf02b6cd-4bd7-4e59-986b-278596cec0a6 admin admin] Exception during me
ssage handling: string indices must be integers
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher Traceback (most recent call last):
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatch
er.py", line 142, in _dispatch_and_reply
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher executor_callback))
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatch
er.py", line 186, in _dispatch
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher executor_callback)
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatch
er.py", line 130, in _do_dispatch
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher result = func(ctxt, **new_args)
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher File "/opt/stack/nova/nova/compute/manager.py", line 6756, in swap_volum
e
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher new_volume_id)
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher File "/opt/stack/nova/nova/exception.py", line 88, in wrapped
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher payload)
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", li
ne 85, in __exit__
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher six.reraise(self.type_, self.value, self.tb)
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher File "/opt/stack/nova/nova/exception.py", line 71, in wrapped
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher return f(self, context, *args, **kw)
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher File "/opt/stack/nova/nova/compute/manager.py", line 311, in decorated_f
unction
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher instance_uuid = keyed_args['instance']['uuid']
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher TypeError: string indices must be integers
2015-04-16 17:35:31.046 TRACE oslo_messaging.rpc.dispatcher

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/174307