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I think I found some problems of qpid as rpcbackend, however I'm not sure about it. Could anyone try to test it with your environment?

openstack grizzly version

config file need debug=True

  1. service openstack-cinder-scheduler stop (nova-compute, nova-scheduler, etc)
  2. " vi /var/log/cinder/scheduler.log " some info will be found like this.

2013-05-27 06:02:46 CRITICAL [cinder] need more than 0 values to unpack Traceback (most recent call last): File "/usr/bin/cinder-scheduler", line 50, in <module> service.wait() File "/usr/lib/python2.6/site-packages/cinder/service.py", line 613, in wait rpc.cleanup() File "/usr/lib/python2.6/site-packages/cinder/openstack/common/rpc/__init__.py", line 240, in cleanup return _get_impl().cleanup() File "/usr/lib/python2.6/site-packages/cinder/openstack/common/rpc/impl_qpid.py", line 649, in cleanup return rpc_amqp.cleanup(Connection.pool) File "/usr/lib/python2.6/site-packages/cinder/openstack/common/rpc/amqp.py", line 671, in cleanup connection_pool.empty() File "/usr/lib/python2.6/site-packages/cinder/openstack/common/rpc/amqp.py", line 80, in empty self.get().close() File "/usr/lib/python2.6/site-packages/cinder/openstack/common/rpc/impl_qpid.py", line 386, in close self.connection.close() File "<string>", line 6, in close File "/usr/lib/python2.6/site-packages/qpid/messaging/endpoints.py", line 316, in close ssn.close(timeout=timeout) File "<string>", line 6, in close File "/usr/lib/python2.6/site-packages/qpid/messaging/endpoints.py", line 749, in close if not self._ewait(lambda: self.closed, timeout=timeout): File "/usr/lib/python2.6/site-packages/qpid/messaging/endpoints.py", line 566, in _ewait result = self.connection._ewait(lambda: self.error or predicate(), timeout) File "/usr/lib/python2.6/site-packages/qpid/messaging/endpoints.py", line 208, in _ewait result = self._wait(lambda: self.error or predicate(), timeout) File "/usr/lib/python2.6/site-packages/qpid/messaging/endpoints.py", line 193, in _wait return self._waiter.wait(predicate, timeout=timeout) File "/usr/lib/python2.6/site-packages/qpid/concurrency.py", line 57, in wait self.condition.wait(3) File "/usr/lib/python2.6/site-packages/qpid/concurrency.py", line 96, in wait sw.wait(timeout) File "/usr/lib/python2.6/site-packages/qpid/compat.py", line 53, in wait ready, _, _ = select([self], [], [], timeout) ValueError: need more than 0 values to unpack