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Hi:All� � I noticed that there are many error logs in my�openvswitch-agent.log of network node.� �for example:=================================================================================================2015-07-14 03:28:45.256 5934 ERROR root [-] Unexpected exception occurred 61 time(s)... retrying.�2015-07-14 03:28:45.256 5934 TRACE root Traceback (most recent call last):

2015-07-14 03:28:45.256 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 95, in inner_func

2015-07-14 03:28:45.256 5934 TRACE root     return infunc(*args, **kwargs)

2015-07-14 03:28:45.256 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_executors/impl_eventlet.py", line 96, in _executor_thread

2015-07-14 03:28:45.256 5934 TRACE root     incoming = self.listener.poll()

2015-07-14 03:28:45.256 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 122, in poll

2015-07-14 03:28:45.256 5934 TRACE root     self.conn.consume(limit=1, timeout=timeout)

2015-07-14 03:28:45.256 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_rabbit.py", line 1147, in consume

2015-07-14 03:28:45.256 5934 TRACE root     six.next(it)

2015-07-14 03:28:45.256 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_rabbit.py", line 1045, in iterconsume

2015-07-14 03:28:45.256 5934 TRACE root     error_callback=_error_callback)

2015-07-14 03:28:45.256 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_rabbit.py", line 853, in ensure

"openvswitch-agent.log" 70801L, 10195852C                                                                                                                           1,1           Top

2015-07-14 17:15:16.908 5934 ERROR oslo_messaging._drivers.impl_rabbit [-] Failed to consume message from queue: 'NoneType' object has no attribute '__getitem__'

2015-07-14 17:15:17.910 5934 ERROR oslo_messaging._drivers.impl_rabbit [-] Failed to consume message from queue: 'NoneType' object has no attribute '__getitem__'

2015-07-14 17:15:18.910 5934 ERROR oslo_messaging._drivers.impl_rabbit [-] Failed to consume message from queue: 'NoneType' object has no attribute '__getitem__'

2015-07-14 17:15:18.911 5934 ERROR root [-] Unexpected exception occurred 61 time(s)... retrying.

2015-07-14 17:15:18.911 5934 TRACE root Traceback (most recent call last):

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 95, in inner_func

2015-07-14 17:15:18.911 5934 TRACE root     return infunc(*args, **kwargs)

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_executors/impl_eventlet.py", line 96, in _executor_thread

2015-07-14 17:15:18.911 5934 TRACE root     incoming = self.listener.poll()

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 122, in poll

2015-07-14 17:15:18.911 5934 TRACE root     self.conn.consume(limit=1, timeout=timeout)

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_rabbit.py", line 1147, in consume

2015-07-14 17:15:18.911 5934 TRACE root     six.next(it)

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_rabbit.py", line 1045, in iterconsume

2015-07-14 17:15:18.911 5934 TRACE root     error_callback=_error_callback)

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_rabbit.py", line 853, in ensure

2015-07-14 17:15:18.911 5934 TRACE root     ret, channel = autoretry_method()

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/kombu/connection.py", line 453, in _ensured

2015-07-14 17:15:18.911 5934 TRACE root     return fun(*args, **kwargs)

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/kombu/connection.py", line 520, in __call__

2015-07-14 17:15:18.911 5934 TRACE root     self.revive(create_channel())

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/kombu/connection.py", line 251, in channel

2015-07-14 17:15:18.911 5934 TRACE root     chan = self.transport.create_channel(self.connection)

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/kombu/transport/pyamqp.py", line 91, in create_channel

2015-07-14 17:15:18.911 5934 TRACE root     return connection.channel()

2015-07-14 17:15:18.911 5934 TRACE root   File "/usr/lib/python2.7/site-packages/amqp/connection.py", line 279, in channel

2015-07-14 17:15:18.911 5934 TRACE root     return self.channels[channel_id]

2015-07-14 17:15:18.911 5934 TRACE root TypeError: 'NoneType' object has no attribute '__getitem__'

2015-07-14 17:15:18.911 5934 TRACE root

2015-07-14 17:15:19.913 5934 ERROR oslo_messaging._drivers.impl_rabbit [-] Failed to consume message from queue: 'NoneType' object has no attribute '__getitem__'

2015-07-14 17:15:20.913 5934 ERROR oslo_messaging._drivers.impl_rabbit [-] Failed to consume message from queue: 'NoneType' object has no attribute '__getitem__'

2015-07-14 17:15:21.915 5934 ERROR oslo_messaging._drivers.impl_rabbit [-] Failed to consume message from queue: 'NoneType' object has no attribute '__getitem__'

2015-07-14 17:15:22.915 5934 ERROR oslo_messaging._drivers.impl_rabbit [-] Failed to consume message from queue: 'NoneType' object has no attribute '__getitem__'

2015-07-14 17:15:23.917 5934 ERROR oslo_messaging._drivers.impl_rabbit [-] Failed to consume message from queue: 'NoneType' object has no attribute '__getitem__'
====================================================================================================================PS:my environment:� ��CentOS 7.1.� ��OpenStack kilo.setup just follow the guide of :http://docs.openstack.org/kilo/install-guide/install/yum/content/� ��

walter

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