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[yong sheng gong <gong_ys2004@xxxxxxxxxx>]

Public bug reported:

Ironic will fail sometimes to clear the node's instance_uuid
even when the instance is deleted on the nova side.

The ironic virt driver should be more tolerant in this case.
Instead of rasing exception, it can LOG warning the failed
instances.

the problem code is at
https://github.com/openstack/nova/blob/master/nova/virt/ironic/driver.py#L475

** Affects: nova
     Importance: Undecided
     Assignee: yong sheng gong (gongysh)
         Status: In Progress

** Changed in: nova
     Assignee: (unassigned) => yong sheng gong (gongysh)

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https://bugs.launchpad.net/bugs/1586470

Title:
  ironic driver is raising exception when some of node's instance cannot
  be found

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  Ironic will fail sometimes to clear the node's instance_uuid
  even when the instance is deleted on the nova side.

  The ironic virt driver should be more tolerant in this case.
  Instead of rasing exception, it can LOG warning the failed
  instances.

  the problem code is at
  https://github.com/openstack/nova/blob/master/nova/virt/ironic/driver.py#L475

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