Comment 7 for bug 1422504

Reviewed: https://review.openstack.org/180466
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=45ea2cf10033e12c63b8ce2cd78b04755d0aba64
Submitter: Jenkins
Branch: master

commit 45ea2cf10033e12c63b8ce2cd78b04755d0aba64
Author: Oleg Bondarev <email address hidden>
Date: Wed May 6 12:50:11 2015 +0300

    Wrap ML2 delete_port with db retry decorator

    ML2 delete_port operation currently involves locking ports
    and bindings tables which may lead to DBDeadlock errors in certain
    cases when several ports are deleted concurrently.
    That may happen due to specifics of Galera working in active-active
    mode: it may throw deadlock errors when it fails to validate
    a change with other members of the cluster.
    The fix adds retries to delete port operation to overcome such
    deadlocks

    Closes-Bug: #1422504
    Change-Id: I684691d59c5ac370d74314c3c91857dc709b2d9b