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[aliex_liu <aliex_liu@xxxxxxxxxxx>]

control node:
011-10-27 17:57:41,819 CRITICAL nova [-] UnboundLocalError local variable 'filename' referenced before assignment
[u'Traceback (most recent call last):\n', u'  File "/usr/lib/pymodules/python2.6/nova/rpc.py", line 188, in _receive\n    rval = node_func(context=ctxt, **node_args)\n', u'  File "/usr/lib/pymodules/python2.6/nova/scheduler/manager.py", line 83, in _schedule\n    **kwargs)\n', u'  File "/usr/lib/pymodules/python2.6/nova/scheduler/driver.py", line 101, in schedule_live_migration\n    self._live_migration_common_check(context, instance_ref, dest)\n', u'  File "/usr/lib/pymodules/python2.6/nova/scheduler/driver.py", line 196, in _live_migration_common_check\n    self.mounted_on_same_shared_storage(context, instance_ref, dest)\n', u'  File "/usr/lib/pymodules/python2.6/nova/scheduler/driver.py", line 313, in mounted_on_same_shared_storage\n    "args": {\'filename\': filename}})\n', u"UnboundLocalError: local variable 'filename' referenced before assignment\n"]
(nova): TRACE: Traceback (most recent call last):
(nova): TRACE:   File "/usr/bin/nova-manage", line 1122, in <module>
(nova): TRACE:     main()
(nova): TRACE:   File "/usr/bin/nova-manage", line 1111, in main
(nova): TRACE:     fn(*argv)
(nova): TRACE:   File "/usr/bin/nova-manage", line 643, in live_migration
(nova): TRACE:     "topic": FLAGS.compute_topic}})
(nova): TRACE:   File "/usr/lib/pymodules/python2.6/nova/rpc.py", line 385, in call
(nova): TRACE:     raise wait_msg.result
(nova): TRACE: RemoteError: UnboundLocalError local variable 'filename' referenced before assignment

compute node:

2011-10-27 15:09:03,379 ERROR nova [-] Exception during message handling
(nova): TRACE: Traceback (most recent call last):
(nova): TRACE:   File "/usr/lib/pymodules/python2.6/nova/rpc.py", line 188, in _receive
(nova): TRACE:     rval = node_func(context=ctxt, **node_args)
(nova): TRACE:   File "/usr/lib/pymodules/python2.6/nova/exception.py", line 126, in _wrap
(nova): TRACE:     raise Error(str(e))
(nova): TRACE: Error: [Errno 13] Permission denied: '/var/lib/nova/instances/tmpI5oQvP'
(nova): TRACE:
2011-10-27 15:09:03,379 ERROR nova.rpc [-] return [Errno 13] Permission denied: '/var/lib/nova/instances/tmpI5oQvP'  exception

what cause this error,and what should i do?
2011-10-27 



aliex_liu