Logical error in blockless fanout of zmq

[Li Ma]

In impl_zmq.py: _multi_send()

# This supports brokerless fanout (addresses > 1)
for queue in queues:
    (_topic, ip_addr) = queue
    _addr = "tcp://%s:%s" % (ip_addr, conf.rpc_zmq_port)
    if method.__name__ == '_cast':
        eventlet.spawn_n(method, _addr, context,
                         _topic, msg, timeout, envelope,
                         _msg_id)
        return
    return method(_addr, context, _topic, msg, timeout,
                  envelope)

The blockless fanout doesn't take effect and it only processes
the FIRST one by returning after the first loop.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/84310

[Openstack Gerrit (openstack-gerrit)]

Reviewed: https://review.openstack.org/84310
Committed: https://git.openstack.org/cgit/openstack/oslo.messaging/commit/?id=de2de36a4a1a69cbbfedec9a8d0619a50e49f77b
Submitter: Jenkins
Branch: master

commit de2de36a4a1a69cbbfedec9a8d0619a50e49f77b
Author: Li Ma <email address hidden>
Date: Mon Mar 31 19:00:41 2014 -0700

    Logical error in blockless fanout of zmq

    The blockless fanout doesn't take effect and it
    only processes the FIRST one by returning after the first loop.

    Change-Id: Iad071ab455e36be7b26637b286ca9f83fea4a019
    Closes-Bug: #1300539