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["Dr. Jens Harbott" <j.harbott@xxxxxxxx>]

Looks like the fix in devstack has been abandoned and the issue resolved
via a patch in grenade, please update if this is incorrect.

** Changed in: devstack
       Status: In Progress => Invalid

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https://bugs.launchpad.net/bugs/1736385

Title:
  placement is not being properly restarted in grenade (pike to master)

Status in devstack:
  Invalid
Status in grenade:
  Fix Released
Status in OpenStack Compute (nova):
  Opinion

Bug description:
  When the placement service is supposed to restart in grenade (pike to
  master) it doesn't actually restart:

  http://logs.openstack.org/93/385693/84/check/legacy-grenade-dsvm-
  neutron-multinode-live-
  migration/9fa93e0/logs/grenade.sh.txt.gz#_2017-12-05_00_08_01_111

  This leads to issues with new microversions not being available:

  http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22Unacceptable%20version%20header%3A%201.14%5C%22

  This is a latent bug that was revealed, at least in part, by efried's
  (correct) changes in https://review.openstack.org/#/c/524263/

  It looks like a bad assumption is being made somewhere in the handling
  of the systemd unit files: a 'start' when it is already started is
  success, but does not restart (thus new code is not loaded).

  We can probably fix this by using the 'restart' command instead of
  'start':

   restart PATTERN...
             Restart one or more units specified on the command line. If the units are not running yet, they will be started.

  
  Adding grenade and devstack as relate projects as the fix is presumably in devstack itself.

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