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[sean mooney <2092391@xxxxxxxxxxxxxxxxxx>]

resartign the comptue service while any rpc action (*live migration,
spawn any other operation) is not supported by nova.

if you take that action then you violate all pre and postcontion of
ongriong operations.

we can try and minimise the impact of this but its not a goal of nova to
make restartign the aginet when there are ongoing actions supported in
the sort to medium term.

there is some discussion of support graceful shutdown but that will
involve aborting ongoing operations before the agent shutdown.

** Changed in: nova
       Status: New => Opinion

** Changed in: nova
   Importance: Undecided => Wishlist

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https://bugs.launchpad.net/bugs/2092391

Title:
  duplication instances when nova compute service restart

Status in OpenStack Compute (nova):
  Opinion

Bug description:
  During the post phase of instance live migration, if the nova compute
  service is restarted, duplication instances may occur.

  The nova compute service restarted but the libvirt continue to execute
  live migration, the below scenario:

  The libvirt live migration completed and instance can work
  properly，the source nova compute service will resume instance on
  source node while nova compute serivce restarted.

  This will produce duplication instances.

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