I met this error again:

2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server Traceback (most recent call last):
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 133, in _process_incoming
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     res = self.dispatcher.dispatch(message)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 153, in dispatch
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     return self._do_dispatch(endpoint, method, ctxt, args)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 122, in _do_dispatch
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     result = func(ctxt, **new_args)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/exception.py", line 110, in wrapped
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     payload)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 221, in __exit__
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     self.force_reraise()
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 197, in force_reraise
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/exception.py", line 89, in wrapped
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     return f(self, context, *args, **kw)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/compute/manager.py", line 359, in decorated_function
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     LOG.warning(msg, e, instance=instance)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 221, in __exit__
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     self.force_reraise()
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 197, in force_reraise
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/compute/manager.py", line 328, in decorated_function
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     return function(self, context, *args, **kwargs)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/compute/manager.py", line 387, in decorated_function
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     kwargs['instance'], e, sys.exc_info())
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 221, in __exit__
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     self.force_reraise()
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 197, in force_reraise
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/compute/manager.py", line 375, in decorated_function
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     return function(self, context, *args, **kwargs)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/compute/manager.py", line 4991, in swap_volume
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     resize_to)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/compute/manager.py", line 4943, in _swap_volume
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     self.volume_api.unreserve_volume(context, new_volume_id)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 221, in __exit__
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     self.force_reraise()
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 197, in force_reraise
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/compute/manager.py", line 4924, in _swap_volume
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     resize_to)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1429, in swap_volume
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     self._swap_volume(guest, disk_dev, conf.source_path, resize_to)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1385, in _swap_volume
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     dev.rebase(new_path, copy=True, reuse_ext=True)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/opt/stack/nova/nova/virt/libvirt/guest.py", line 529, in rebase
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     self._disk, base, self.REBASE_DEFAULT_BANDWIDTH, flags=flags)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 186, in doit
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     result = proxy_call(self._autowrap, f, *args, **kwargs)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 144, in proxy_call
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     rv = execute(f, *args, **kwargs)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 125, in execute
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     six.reraise(c, e, tb)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 83, in tworker
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     rv = meth(*args, **kwargs)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server   File "/usr/lib64/python2.7/site-packages/libvirt.py", line 924, in blockRebase
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server     if ret == -1: raise libvirtError ('virDomainBlockRebase() failed', dom=self)
2016-06-16 19:03:46.892 TRACE oslo_messaging.rpc.server libvirtError: unsupported configuration: block copy is not supported with this QEMU binary