Comment 3 for bug 1472710

Reviewed: https://review.openstack.org/201393
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=c18e1c7cad6f0209a322a0db1ec653bc7940a0d8
Submitter: Jenkins
Branch: master

commit c18e1c7cad6f0209a322a0db1ec653bc7940a0d8
Author: Patrick East <email address hidden>
Date: Mon Jul 13 15:49:40 2015 -0700

    Prevent missing Purity hosts from raising errors

    Occasionally a Purity host can be deleted out from underneath Cinder.
    When this happens if cinder is attempting to disconnect a volume from
    that host we should treat it as a ‘success’ since if the host is gone,
    it is disconnected already (as far as Purity is concerned).

    To prevent one cause of this, the disconnect method will now be locked
    with the connect ones so that can’t delete a host we intend to re-use.

    Change-Id: Iba82c93f9e101709cf5532225068474688187b29
    Closes-bug: #1472710