Cinder related change:

** Changed in: os-brick
       Status: In Progress => Invalid

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  os-brick 1.4.0 increases volume setup failure rates

Status in OpenStack Compute (nova):
  Fix Released
Status in os-brick:
Status in oslo.privsep:

Bug description:
  Since merging upper constraints 1.4.0 into upper-constraints, the
  multinode grenade jobs are hitting a nearly 1/3 failure rate on boot
  from volume scenarios around volume setup. This would be on Newton
  code using Mitaka configs.

  Representative failures are of the following form:

  The 1/3 failure rate is suspicious, and in the past has often hinted
  towards a race condition interacting between parallel API requests.

  The failure rate increase can be seen here -

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