Comment 8 for bug 1430984

Reviewed: https://review.openstack.org/163673
Committed: https://git.openstack.org/cgit/openstack/oslo.messaging/commit/?id=3be95adcebfef6e862eda2827a216048b4e9007a
Submitter: Jenkins
Branch: master

commit 3be95adcebfef6e862eda2827a216048b4e9007a
Author: Assaf Muller <email address hidden>
Date: Wed Mar 11 21:39:54 2015 -0400

    Add support for multiple namespaces in Targets

    In order for projects to use the namespace property of Targets
    in a backwards compatible way (To support rolling upgrades),
    a Target may now belong to more than a single namespace (i.e.
    'namespace1' and None). This way, if the server is upgraded first,
    the version that introduces namespaces to a project will place
    the server RPC methods in ['some_namespace', None]. Pre-upgrade
    agents will send messages in the null namespace while post-upgrade
    agents will send messages in 'some_namespace', and both will be
    accepted.

    Change-Id: I713fe9228111c36aa3f7fb95cbd59c99100e8c96
    Closes-Bug: #1430984