Comment 13 for bug 1362863

We see things like this in the logs:

2014-10-22 11:18:18.358 30300 WARNING oslo.messaging._drivers.amqpdriver [-] _queues: {'40282b6608f245dc9903a6d31cbf09dd': <Queue at 0x7f5ebab97390 maxsize=None>}
2014-10-22 11:18:18.359 30300 WARNING oslo.messaging._drivers.amqpdriver [-] No calling threads waiting for msg_id : 2fdbf0667a1a49d4af6a022549f6737d, message : {u'_unique_id': u'cea90764a9714fe8ade5a5ff2dbd2a17', u'failure': None, u'result': None, u'ending': True}
2014-10-22 11:18:18.360 30300 WARNING oslo.messaging._drivers.amqpdriver [-] _queues: {'40282b6608f245dc9903a6d31cbf09dd': <Queue at 0x7f5ebab97390 maxsize=None>}