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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

** Also affects: nova/queens
   Importance: Undecided
       Status: New

** Also affects: nova/rocky
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1789484

Title:
  n-cpu fails init on timeout calling n-cond-cell1

Status in OpenStack Compute (nova):
  Triaged
Status in OpenStack Compute (nova) queens series:
  New
Status in OpenStack Compute (nova) rocky series:
  New

Bug description:
  We've seen several cases now where n-cpu fails to start in gate runs.
  It appears that during the service init it tries to call out to the
  cell1 conductor. Logs show n-cond-cell1 did start about 1 second
  before this, but maybe too soon to accept API calls. Traceback in the
  n-cpu log has the message:

  "MessagingTimeout: Timed out waiting for a reply to message ID"

  http://eavesdrop.openstack.org/irclogs/%23openstack-nova/%23openstack-
  nova.2018-08-28.log.html#t2018-08-28T19:28:52

  http://logstash.openstack.org/#/dashboard/file/logstash.json?query=message:%5C%22_determine_version_cap%5C%22%20AND%20tags:%5C%22screen-n-cpu.txt%5C%22&from=7d

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