Comment 15 for bug 1750777

Reviewed: https://review.openstack.org/554258
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=cca870abbc4f8a784c9cbed817ff307ab3094daa
Submitter: Zuul
Branch: stable/queens

commit cca870abbc4f8a784c9cbed817ff307ab3094daa
Author: Thomas Morin <email address hidden>
Date: Sat Mar 3 00:00:47 2018 +0000

    Remove race and simplify conntrack state management

    This change:
    * avoids creating lots of short-lived threads
      (because: why would we ?)
    * adds a try/except block to be sure we can log
      any issue that would otherwise be hidden by
      spawn_n.
    * changes class from Queue to LightQueue after
      eventlet.queue code inspection, since it's a
      little smaller and should be faster

    Change-Id: Ic348c08af375099a919116188ae17d2017695ecb
    Closes-Bug: 1750777
    (cherry picked from commit 35c225aaa37ee685000bfa07a02e83481485138d)