assertNull(lastNotification);
// Kill the subscriber and check for the queue depth values.
// Messages are unacknowledged, so those should get requeued. All messages should be on the Queue
_queue.unregisterProtocolSession(protocolSession, channel.getChannelId(), new AMQShortString("consumer_tag"));
channel.requeue();
assertEquals(new Long(totalSize), new Long(_queueMBean.getQueueDepth()));
lastNotification = _queueMBean.getLastNotification();
assertNotNull(lastNotification);