Comment 3 for bug 1424578

Reviewed: https://review.openstack.org/158242
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=4d4de151e9a0edd86b8ce5b055e56a5784d5c08f
Submitter: Jenkins
Branch: master

commit 4d4de151e9a0edd86b8ce5b055e56a5784d5c08f
Author: Eugene Nikanorov <email address hidden>
Date: Mon Feb 23 13:29:08 2015 +0300

    Avoid DetachedInstanceError after session rollback

    In some cases this exception is thrown while accessing Agent
    object from logging statement after a transaction was rolled back.
    There is a unit test that covers thsi code patch, but the issue
    is not reproducible with sqlite.
    Just avoid accessing db object after session had been closed.

    Change-Id: Iff6b72156b08f177bd0c71f6ba93d3bf46c82fa4
    Closes-Bug: #1424578