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[Joe Cropper <jwcroppe@xxxxxxxxxx>]

Public bug reported:

For example, take this scenario:

1. Assume an environment with a single host… call it host-1
2. Deploy a VM, but force an exception in the spawn path somewhere to simulate some "hypervisor error”
3. The scheduler correctly attempts to reschedule the VM, and ultimately ends up (correctly) with a NoValidHost error because there was only 1 host
4. However, the instance.host (e.g., [nova show <vm>]) is still showing ‘host-1’

After discussion on the mailing list and IRC, we decided this should be
considered a bug since the instance is no longer tied to the host since
it blew up in spawn and tried to reschedule.  As such, we should clear
it out when the claim is aborted.

** Affects: nova
     Importance: Undecided
     Assignee: Joe Cropper (jwcroppe)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Joe Cropper (jwcroppe)

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https://bugs.launchpad.net/bugs/1427944

Title:
  instance.host not cleared after reschedule

Status in OpenStack Compute (Nova):
  New

Bug description:
  For example, take this scenario:

  1. Assume an environment with a single host… call it host-1
  2. Deploy a VM, but force an exception in the spawn path somewhere to simulate some "hypervisor error”
  3. The scheduler correctly attempts to reschedule the VM, and ultimately ends up (correctly) with a NoValidHost error because there was only 1 host
  4. However, the instance.host (e.g., [nova show <vm>]) is still showing ‘host-1’

  After discussion on the mailing list and IRC, we decided this should
  be considered a bug since the instance is no longer tied to the host
  since it blew up in spawn and tried to reschedule.  As such, we should
  clear it out when the claim is aborted.

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