2012-04-11 09:49:04 ERROR nova.rpc.amqp [req-f2165842-1d51-4b36-90aa-8b80eb588ead ef2fbadc9e1e4fa4b89f0299741a25d8 2a118220740f4df2b5a0cfc7398dffb7] Exception during message handling
(nova.rpc.amqp): TRACE: Traceback (most recent call last):
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/rpc/amqp.py", line 252, in _process_data
(nova.rpc.amqp): TRACE:     rval = node_func(context=ctxt, **node_args)
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 114, in wrapped
(nova.rpc.amqp): TRACE:     return f(*args, **kw)
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 153, in decorated_function
(nova.rpc.amqp): TRACE:     function(self, context, instance_uuid, *args, **kwargs)
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 177, in decorated_function
(nova.rpc.amqp): TRACE:     sys.exc_info())
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
(nova.rpc.amqp): TRACE:     self.gen.next()
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 171, in decorated_function
(nova.rpc.amqp): TRACE:     return function(self, context, instance_uuid, *args, **kwargs)
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 747, in terminate_instance
(nova.rpc.amqp): TRACE:     do_terminate_instance()
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 945, in inner
(nova.rpc.amqp): TRACE:     retval = f(*args, **kwargs)
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 740, in do_terminate_instance
(nova.rpc.amqp): TRACE:     self._delete_instance(context, instance)
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 718, in _delete_instance
(nova.rpc.amqp): TRACE:     self._shutdown_instance(context, instance, 'Terminating')
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 685, in _shutdown_instance
(nova.rpc.amqp): TRACE:     context, instance_id)
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 637, in _get_instance_volume_block_device_info
(nova.rpc.amqp): TRACE:     cinfo = utils.loads(bdm['connection_info'])
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 830, in loads
(nova.rpc.amqp): TRACE:     return json.loads(s)
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/json/__init__.py", line 326, in loads
(nova.rpc.amqp): TRACE:     return _default_decoder.decode(s)
(nova.rpc.amqp): TRACE:   File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
(nova.rpc.amqp): TRACE:     obj, end = self.raw_decode(s, idx=_w(s, 0).end())
(nova.rpc.amqp): TRACE: TypeError: expected string or buffer