Comment 2 for bug 1663216

Reviewed: https://review.openstack.org/431516
Committed: https://git.openstack.org/cgit/openstack/oslo.rootwrap/commit/?id=a76f5daad99de32bed3a5f901768c24fc869e2a5
Submitter: Jenkins
Branch: master

commit a76f5daad99de32bed3a5f901768c24fc869e2a5
Author: XianChaobo <email address hidden>
Date: Thu Feb 9 21:14:47 2017 +0800

    Always check cmd which does not exist

    In daemon mode, if run a cmd which does not exist,
    it will raise an Exception. But when we install the
    cmd later and run cmd, it still raise an Exception.
    The only work around right now is to restart the
    daemon, with this change, we can avoid restarting
    the daemon

    Closes-Bug: #1663216
    Change-Id: I6f6ff540ed103f0fec329d6264bdac26493c8fad