Hi, I have an issue where persistent messages on a queue are being moved to the DLQ when there is no active consumer on the queue. I am not sure if this is an issue with activeMQ or Camel.
The set-up is as follows: messages or put onto a queue in an embedded broker which is bridged to a standalone broker. From here, it is first routed to a topic, and from there onto one or more queues to be processed by the consumers. This works ok when all components are active, but if the consumers are down then I can see the message appear on the queue and then get moved to the DLQ a few seconds later. Why is this - why do the messages not stay in the queue to be picked-up by the consumers when they are active? The producer (JmsTemplate) is set to persistent delivery with a timeToLive set to 691200000, and I have tried with explicitQosEnabled set to both true and false: Camel routes are: So, when there is no consumer on the Client1.Events or Client2.Events queues, the messages get moved to the DLQ. Why is this? What do I have to do/set for the messages to stay on this queue until they are picked-up by a consumer? >From monitoring (using ActiveMW web console) the queues, I can see that it takes approx 30 seconds for the message to be moved to the DLQ (default message ttl?). However, if I bring up a consumer on the queue before this time, it seems that the message is moved to the DLQ as soon as (or just before) the consumer connects to the queue. The following messages are logged when the broker moves the messages to the DLQ: Note that the "expiration" time is 1390408849014 (1 second after the timestamp), so it looks like the time-to-live that I have set is being lost somewhere in transit. Is this not preserved automatically when routed? I have also tried adding 'preserveMessageQos=true' to all the camel routes, e.g This does not seem to make any difference. Do I need to configure the consumer somehow to let the broker know to deliver old (i.e. those put on the queue before the consumer is started) messages? I think i have provided all the relevant information - let me know if you need to know anything else. Thanks in advance, John -- View this message in context: http://activemq.2283324.n4.nabble.com/Persistent-messages-moving-to-DLQ-when-consumer-not-active-tp4676652.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
