neutron-linuxbridge-agent.service 启动错误

[summer]

计算节点操作系统centos7.6，计算节点物理机重启后neutron-linuxbridge-agent.service启动错误，配置肯定都没有问题。
neutron.log日志如下：
2019-10-30 18:33:48.373 10301 INFO oslo_service.service [-] Caught SIGTERM, exiting
2019-10-30 18:33:48.374 10301 INFO neutron.plugins.ml2.drivers.linuxbridge.agent.linuxbridge_neutron_agent [-] Stopping linuxbridge agent.
2019-10-30 18:33:48.375 10301 CRITICAL neutron [-] AttributeError: 'LinuxBridgeNeutronAgentRPC' object has no attribute 'state_rpc'
2019-10-30 18:33:48.375 10301 ERROR neutron Traceback (most recent call last):
2019-10-30 18:33:48.375 10301 ERROR neutron File "/usr/bin/neutron-linuxbridge-agent", line 10, in <module>
2019-10-30 18:33:48.375 10301 ERROR neutron sys.exit(main())
2019-10-30 18:33:48.375 10301 ERROR neutron File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/linuxbridge/agent/linuxbridge_neutron_agent.py", line 1201, in main
2019-10-30 18:33:48.375 10301 ERROR neutron launcher.wait()
2019-10-30 18:33:48.375 10301 ERROR neutron File "/usr/lib/python2.7/site-packages/oslo_service/service.py", line 281, in wait
2019-10-30 18:33:48.375 10301 ERROR neutron status, signo = self._wait_for_exit_or_signal(ready_callback)
2019-10-30 18:33:48.375 10301 ERROR neutron File "/usr/lib/python2.7/site-packages/oslo_service/service.py", line 268, in _wait_for_exit_or_signal
2019-10-30 18:33:48.375 10301 ERROR neutron self.stop()
2019-10-30 18:33:48.375 10301 ERROR neutron File "/usr/lib/python2.7/site-packages/oslo_service/service.py", line 196, in stop
2019-10-30 18:33:48.375 10301 ERROR neutron self.services.stop()
2019-10-30 18:33:48.375 10301 ERROR neutron File "/usr/lib/python2.7/site-packages/oslo_service/service.py", line 612, in stop
2019-10-30 18:33:48.375 10301 ERROR neutron service.stop()
2019-10-30 18:33:48.375 10301 ERROR neutron File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/linuxbridge/agent/linuxbridge_neutron_agent.py", line 916, in stop
2019-10-30 18:33:48.375 10301 ERROR neutron self.set_rpc_timeout(self.quitting_rpc_timeout)
2019-10-30 18:33:48.375 10301 ERROR neutron File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/linuxbridge/agent/linuxbridge_neutron_agent.py", line 1167, in set_rpc_timeout
2019-10-30 18:33:48.375 10301 ERROR neutron self.state_rpc):
2019-10-30 18:33:48.375 10301 ERROR neutron AttributeError: 'LinuxBridgeNeutronAgentRPC' object has no attribute 'state_rpc'
2019-10-30 18:33:48.375 10301 ERROR neutron
2019-10-30 18:33:49.144 14559 INFO neutron.common.config [-] Logging enabled!
2019-10-30 18:33:49.144 14559 INFO neutron.common.config [-] /usr/bin/neutron-linuxbridge-agent version 7.0.4
2019-10-30 18:33:49.144 14559 INFO neutron.plugins.ml2.drivers.linuxbridge.agent.linuxbridge_neutron_agent [-] Interface mappings: {'public': 'em1'}
2019-10-30 18:33:49.145 14559 INFO neutron.plugins.ml2.drivers.linuxbridge.agent.linuxbridge_neutron_agent [-] Bridge mappings: {}
2019-10-30 18:33:49.145 14559 INFO neutron.plugins.ml2.drivers.linuxbridge.agent.linuxbridge_neutron_agent [-] Agent initialized successfully, now running...

[summer (lummmm)]

openstack 版本为liberty