Start message from OVS agent not received by server

[Xurong Yang]

When OVS agent starts, it will send server a message with "start_flag" to tell server it's up, which is done by the _report_state method. Currently _report_state uses cast method to send rpc message, so there's no guarantee that server receives the "start" message. In our test, sometimes this message did miss. As a result, server didn't update the start time of the agent so fdb entries didn't send by the l2pop driver.

[Akihiro Motoki (amotoki)]

https://review.openstack.org/#/c/108693/

[Kyle Mestery (mestery)]

Moving medium priority bug out of Juno-RC1.

[Kyle Mestery (mestery)]

Per my own confusion, moving back to Juno-RC1.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/108693
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=46501246c202f1f424f0d2a05769926303a39c89
Submitter: Jenkins
Branch: master

commit 46501246c202f1f424f0d2a05769926303a39c89
Author: yangxurong <email address hidden>
Date: Tue Jul 22 21:23:08 2014 +0800

    Use call to report state when ovs_agent starts up

    Make sure to report ovs_agent state when starting up, otherwise
    ovs_agent start_time would not be updated and thus l2pop does
    not send fdb entries.

    Change-Id: Idd770a85a9eabff112d9613e75d8bb524020234a
    Closes-Bug: #1347452