Comment 9 for bug 1404867

Reviewed: https://review.openstack.org/194063
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=ecdf331bafddfd2bb8c92d3fd96f301bc7ac644f
Submitter: Jenkins
Branch: master

commit ecdf331bafddfd2bb8c92d3fd96f301bc7ac644f
Author: ankitagrawal <email address hidden>
Date: Wed Sep 23 03:58:19 2015 -0700

    Detach volume after deleting instance with no host

    If an instance is booted from a volume, shelved, and goes into an error
    state due to some reason. Volume from which instance is booted, remains
    in-use state even the instance is deleted because instance has no host
    associated with it.

    Called _local_delete() to detach volume and destroy bdm if instance is
    in shelved_offloaded state or has no host associated with it. This will
    cleanup both volumes and the networks.

    Note:
    I had submitted same patch [1] earlier which was reverted [2] due to a
    race condition on jenkins if an instance is deleted when it is in
    building state. In this patch I have fixed the failure of race condition
    by reverting the ObjectActionError exception handling in _delete.

    [1] Ic630ae7d026a9697afec46ac9ea40aea0f5b5ffb
    [2] Id4e405e7579530ed1c1f22ccc972d45b6d185f41

    Closes-Bug: 1404867
    Closes-Bug: 1408527
    Closes-Bug: 1458308
    Change-Id: Ic107d8edc7ee7a4ebb04eac58ef0cdbf506d6173