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[OpenStack Infra <1667040@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/437061
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=434a953190647c398160ca815e7ce3c0796fc5a4
Submitter: Jenkins
Branch:    master

commit 434a953190647c398160ca815e7ce3c0796fc5a4
Author: Stephen Finucane <sfinucan@xxxxxxxxxx>
Date:   Wed Feb 22 13:02:47 2017 -0500

    libvirt: Handle InstanceNotFound exception
    
    In 'ad1c7ac2', we stopped returning NovaException from certain libvirt
    operations in favour of more specific exception types. Unfortunately, as
    part of this changeover we missed an exception type. Correct this
    oversight.
    
    Change-Id: I376ebda6c4626df8be2e827bc735116a90528654
    Resolves-bug: #1667040


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1667040

Title:
  InstanceNotFound exception during check_instance_exists on instance
  evacuation

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) ocata series:
  New

Bug description:
  Description
  ===========
  During instance evacuation to a new destination node, the InstanceNotFound exception is seen when check_instance_exists is called during the rebuild.

  check_instance_exists is making sure the instance does _not_ exist,
  with the intent that an exception will be raised if the instance does
  already exist on a destination node.

  The libvirt driver's instance_exists currently catches the
  InternalError exception, but not the InstanceNotFound exception.

  I believe this only affects the libvirt instance_exists
  implementation.

  Steps to reproduce
  ==================
  On a multi node libvirt/kvm system:

  1. launch an instance on compute A
  2. kill compute A nova-compute process
  3. evacuate the instance on compute A

  Environment
  ===========
  1. Openstack release: Ocata + devstack

  2. Which hypervisor did you use?
     Libvirt + KVM
     What's the version of that?

  2. Which storage type did you use?
     LVM

  3. Which networking type did you use?
     Neutron with OpenVSwitch

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