When you use a queue connection , irrespective of other settings, message delivery is guaranteed. When you use a topic connection , message delivery is guaranteed only when the delivery mode is persistent and the subscriber is durable.
Suchitha. -----Original Message----- From: GaryG [mailto:[EMAIL PROTECTED] Sent: Thursday, February 01, 2007 11:49 AM To: activemq-users@geronimo.apache.org Subject: Queue question I'm doing some simple communication between two peers via a Queue, and I'm noticing odd persistence behavior. Even though both the producer is set with DeliveryMode.NON_PERSISTENT, what I see happen is this: 1) Bring up AMQ broker 2) Bring up Producer and send 5 test messages. At this point the consumer of the messages for this Q is not even running. 3) Bing up Consumer and it receive the 5 messages. I've tried setting TTL on the Producer to something really short, but that didn't help. This seems wrong to me, as I would only expect the messages to be delivered to the consumer of the Q if the consumer was A) actually running, or B) there was persistence turned on. If I use a Topic instead, the above scenario works as expected, and I only get the missed messages if I turn on persistence. What am I missing? Perhaps I'm not grasping what persistence is and how it should work? I understand the messages persisted to a DB for backup, how is that different from journaling? If I want delivery assurance, even if a consumer is down, do I have to turn on DeliveryMode.PERSISTENT on the producer, AND use a DurableSubscriber on the consumer end? I appreciate any help! -GaryG -- View this message in context: http://www.nabble.com/Queue-question-tf3157001.html#a8755070 Sent from the ActiveMQ - User mailing list archive at Nabble.com.
