Comment 2 for bug 1722371

Reviewed: https://review.openstack.org/510674
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=79cc0cc7b93b98ebb1e7e0d7f838fc1186d7bc47
Submitter: Zuul
Branch: master

commit 79cc0cc7b93b98ebb1e7e0d7f838fc1186d7bc47
Author: Zane Bitter <email address hidden>
Date: Wed Oct 18 16:46:39 2017 -0400

    Don't attempt to update tmpl ID when resource in progress

    If we attempt to do a convergence update on a resource and find it already
    locked by another traversal, don't try to update the resource's current
    template ID or requirements data. Doing so will usually fail with the same
    exception, but it is unnecessary and leaves ERROR-level messages in the
    log. However, there is a race which could result in the call succeeding
    (i.e. if the other task releases the lock just after we fail to get it),
    and that could result in the resource not being updated at all.

    Change-Id: I6bde1f9359cd52c99cca092e8abc660bac8b3065
    Closes-Bug: #1722371