Comment 0 for bug 1311971

When database exception raises in update_port_status, the linuxbridge-agent doesn't deal with them very well that causes accessing not-existed local variables.

2014-04-22 20:35:53.436 494 TRACE neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent Traceback (most recent call last):
2014-04-22 20:35:53.436 494 TRACE neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent File "/usr/lib/python2.6/site-packages/neutron/plugins/linuxbridge/agent/linuxbridge_neutron_agent.py", line 997, in daemon_loop
2014-04-22 20:35:53.436 494 TRACE neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent sync = self.process_network_devices(device_info)
2014-04-22 20:35:53.436 494 TRACE neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent File "/usr/lib/python2.6/site-packages/neutron/plugins/linuxbridge/agent/linuxbridge_neutron_agent.py", line 894, in process_network_devices
2014-04-22 20:35:53.436 494 TRACE neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent resync_b = self.treat_devices_removed(device_info['removed'])
2014-04-22 20:35:53.436 494 TRACE neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent File "/usr/lib/python2.6/site-packages/neutron/plugins/linuxbridge/agent/linuxbridge_neutron_agent.py", line 963, in treat_devices_removed
2014-04-22 20:35:53.436 494 TRACE neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent if details['exists']:
2014-04-22 20:35:53.436 494 TRACE neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent UnboundLocalError: local variable 'details' referenced before assignment
2014-04-22 20:35:53.436 494 TRACE neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent
2014-04-22 20:35:53.437 494 DEBUG neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent [req-ffc712fc-80af-4837-a068-6e1a076e4ebc None] Loop iteration exceeded interval (2 vs. 51.2715768814)! daemon_loop /usr/lib/python2.6/site-packages/neutron/plugins/linuxbridge/agent/linuxbridge_neutron_agent.py:1011
2014-04-22 20:35:53.438 494 INFO neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent [req-ffc712fc-80af-4837-a068-6e1a076e4ebc None] Agent out of sync with plugin!