Comment 12 for bug 1195947

Reviewed: https://review.openstack.org/54916
Committed: http://github.com/openstack/nova/commit/a2487116d583e189dcbfe6f665ba360bf147163f
Submitter: Jenkins
Branch: stable/havana

commit a2487116d583e189dcbfe6f665ba360bf147163f
Author: Nikola Dipanov <email address hidden>
Date: Fri Nov 1 13:37:13 2013 +0100

    Prevent rescheduling on block device failure

    Due to a race condition - it is possible for more instances to race for
    the same volume. In such a scenario, the one that fails will get
    rescheduled, and in the process detach the volume of a successful
    instance.

    To prevent this, this patch makes nova not reschedule on block device
    failures. This is actually reasonable behaviour as block device failures
    are rarely related to the compute host itself and so rescheduling is not
    usually useful.

    This is a stable/havana only fix! This same issue is addressed on the
    master branch by Iefab71047996b7cc08107794d5bc628c11680a70.

    Closes-bug: 1195947

    Change-Id: I6b68965ac65cdb0e1da3b44e83428f056b1693aa