I missed something critical here - Topics. Topic flow across a network of brokers with non-durable subscriptions only is not reliable. Brokers subscribe to one-another in the same manner that end-clients subscribe to a broker. So, for topic subscriptions, that means that while the bridge between two brokers is out (or one of the brokers is down), all messages published to the topic will fail to forward across the bridge.
Once the bridge is re-established, newly published messages continue to flow, but old ones do not. Making matters worse in this scenario - there's no easy way for the topic subscribers to know this happens. -- View this message in context: http://activemq.2283324.n4.nabble.com/Help-with-a-Failover-testing-that-shows-missing-messages-tp4707916p4708646.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
