MQSeries.net :: View topic - Clustered jms sub to a topic : 2429 MQRC_SUBSCRIPTION_IN_USE

Cyrille Le Clerc

Dear all,

Environment : WMQ 7.0.1 on Linux

I would like a clustered java application to durably subscribe to a MQ 7.0 topic via JMS.

To rephrase, I want each pub/sub message to be received exactly once on my cluster. I understand that concurrently listening on the same jms topic subscription will cause the loss of message ordering; it is not a problem for me.

Unfortunately, when I try this, I get a 2429 MQRC_SUBSCRIPTION_IN_USE exception.

Is there a way to create a durable subscription to a topic telling MQ to allow concurrent listeners of this same subscription ?

I saw a workaround :
1. create a topic 'MY_SUBJECT_TOPIC'
2. create a local durable queue 'MY_SUBJECT_QUEUE_TO_MY_APP'
3. create a subscription MY_SUBJECT_SUBSCRIPTION_TO_MY_APP to attach topic 'MY_SUBJECT_TOPIC' to queue MY_SUBJECT_QUEUE_TO_MY_APP'

Thanks to this, all my application cluster nodes can concurrently listen to the same topic subscription but the downside is a more complex MQ configuration.

thanks for your insights,

Cyrille
_________________
Cyrille Le Clerc
cyrille@cyrilleleclerc.com
cleclerc@xebia.fr
http://blog.xebia.fr