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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => liberty-rc1

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https://bugs.launchpad.net/bugs/1486458

Title:
  Hyper-V: snapshot fails if the instance is destroyed beforehand

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  Instance destroy and Instance snapshot are locking operations, meaning
  that they can only occur sequencially. This is the result of the
  bugfix for https://bugs.launchpad.net/nova/+bug/1461970 .

  The problem is that the destroy instance can occur before snapshoting,
  resulting in a VM NotFound exception being raised while snapshoting,
  as the VM no longer exists. In the logs it can be observed that the
  lock was being held by "do_terminate_instance", which was then aquired
  by "instance_synchronized_snapshot".

  This causes failures in some tempest tests.

  Logs: http://paste.openstack.org/show/421642/

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