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[Liang Chen <liang.chen@xxxxxxxxxxxxx>]

Public bug reported:

Update of report_count is not protected in a transaction -
https://github.com/openstack/nova/blob/master/nova/servicegroup/drivers/db.py#L82
.  When multiple service worker processes are used, they may overwrite
each other's report_count update.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1458919

Title:
  a race in service report count update

Status in OpenStack Compute (Nova):
  New

Bug description:
  Update of report_count is not protected in a transaction -
  https://github.com/openstack/nova/blob/master/nova/servicegroup/drivers/db.py#L82
  .  When multiple service worker processes are used, they may overwrite
  each other's report_count update.

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