[Bug 1460164] Re: upgrade of openvswitch-switch can sometimes break neutron-plugin-openvswitch-agent

[James Page]

On a fresh icehouse install I see the following on a restart of ovs:

2015-12-18 11:05:26.855 6876 DEBUG neutron.agent.linux.async_process [-] Halting async process [['ovsdb-client', 'monitor', 'Interface', 'name,ofport', '--format=json']]. stop /usr/lib/python2.7/dist-packages/neutron/agent/linux/async_process.py:90
2015-12-18 11:05:26.857 6876 CRITICAL neutron [-] Trying to re-send() an already-triggered event.

The neutron-plugin-openvswitch-agent then terminates and gets restarted
by upstart, triggering a full sync of ovs state:


2015-12-18 11:05:27.229 11075 INFO neutron.common.config [-] Logging enabled!
2015-12-18 11:05:27.230 11075 DEBUG neutron.plugins.openvswitch.agent.ovs_neutron_agent [-] ******************************************************************************** log_opt_values /usr/lib/python2.7/dist-packages/oslo/config/cfg.py:1928
2015-12-18 11:05:27.230 11075 DEBUG neutron.plugins.openvswitch.agent.ovs_neutron_agent [-] Configuration options gathered from: log_opt_values /usr/lib/python2.7/dist-packages/oslo/config/cfg.py:1929
2015-12-18 11:05:27.230 11075 DEBUG neutron.plugins.openvswitch.agent.ovs_neutron_agent [-] command line args: ['--config-file=/etc/neutron/neutron.conf', '--config-file=/etc/neutron/plugins/ml2/ml2_conf.ini', '--log-file=/var/log/neutron/openvswitch-agent.log'] log_opt_values /usr/lib/python2.7/dist-packages/oslo/config/cfg.py:1930
2015-12-18 11:05:27.230 11075 DEBUG neutron.plugins.openvswitch.agent.ovs_neutron_agent [-] config files: ['/etc/neutron/neutron.conf', '/etc/neutron/plugins/ml2/ml2_conf.ini'] log_opt_values /usr/lib/python2.7/dist-packages/oslo/config/cfg.py:1931

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https://bugs.launchpad.net/bugs/1460164

Title:
  upgrade of openvswitch-switch can sometimes break neutron-plugin-
  openvswitch-agent

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