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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

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

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

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

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

** Changed in: nova/ocata
       Status: New => Triaged

** Changed in: nova/pike
       Status: New => Triaged

** Changed in: nova/queens
       Status: New => Triaged

** Changed in: nova/rocky
       Status: New => Triaged

** Changed in: nova/ocata
   Importance: Undecided => Medium

** Changed in: nova/pike
   Importance: Undecided => Medium

** Changed in: nova/queens
   Importance: Undecided => Medium

** Changed in: nova/rocky
   Importance: Undecided => Medium

** Tags added: libvirt

** Changed in: nova
     Assignee: (unassigned) => Matt Riedemann (mriedem)

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1796981

Title:
  nova/compute/manager.py throws TypeError: 'NoneType' object is not
  iterable

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

Bug description:
  Problem Description: Nova evacuate <instance_id> <target_host_name>
  fails, instances reported in ERROR state after executing “nova
  evacuate”

  Summary: A instance with its boot volume on a shared storage device (
  HP 3Par or SUSE CEPH cluster ) errors out during a evacuate. By making
  a code change to catch the error dereferencing vol_stats in
  nova/compute/manager.py the error can be avoided.

  Included: 
  * Steps to produce it
  * nova evacuate with --debug 
  * Command line output showing the state of the VM before and after the evacuate
  * code that was changed 
  * Command line output showing the successful state of the VM before and after the evacuate

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