Problem with concurrent topic listeners

Hi

I have 2 listeners configured using Spring with each listener listening to the same topic message. I expect only one listener instance/thread for each of the listeners as the concurrency is set to 1 as follows. When the topic message is received as expected I see only one listener instance for Listener1 however listener2 has 2 instances processing the same message concurrently. Any ideas how I can enforce only one listener instance for listener2?

My listener configuration:
===================
<jms:listener-container client-id="ListenerOne" container-type="default" error-handler="jmsErrorHandler" destination-type="topic" connection-factory="jndiJmsConnFactory" acknowledge="auto" concurrency="1">
<jms:listener destination="${destination.topic1}" ref="listenerOne" method="onMessage" />
</jms:listener-container>

<jms:listener-container client-id="ListenerTwo" container-type="default" error-handler="jmsErrorHandler" destination-type="topic" connection-factory="jndiJmsConnFactory" acknowledge="auto" concurrency="1">
<jms:listener destination="${destination.topic1}" ref="listenerTwo" method="onMessage" />
</jms:listener-container>

Thanks
Chandru

Well
If I understand correctly you are trying to implement Point-to-Point messaging paradigm where a Message is only processed once. Is this correct?
If so, why do you use Topic instead of Queue? Topic is the implementation of Pub-Sub messaging paradigm which means every listener subscribing to the topic would get a Message. Am I missing something?

Please use [ code ] ... [ /code ] tags when posting code or config (no spaces inside brackets).

Can you provide a TRACE level log that shows the containers starting up, and processing at least one message?

What version of Spring are you using?

My bad, i think i miss-read it

Hi Gary

Thanks for your response.


My Spring JMs listener configuration
===========================

Code:

---

<jms:listener-container client-id="ListenerMediaRegistered" container-type="default" error-handler="jmsErrorHandler" destination-type="topic"
                connection-factory="jndiJmsConnFactory" acknowledge="auto" concurrency="1">
                <jms:listener destination="${media.registered.destination}" ref="listenerMediaRegisted"
                        method="onMessage" />
        </jms:listener-container>
 
<jms:listener-container client-id="ListenerPhotopassClaim"  container-type="default" error-handler="jmsErrorHandler" destination-type="topic"
                connection-factory="jndiJmsConnFactory" acknowledge="auto" concurrency="1">
            <jms:listener destination="${media.registered.destination}" ref="listenerPhotopassClaim"
                        method="onMessage" />
</jms:listener-container>

---

Log fole showing listener processing
===========================
[2012-11-06 11:52:58,288] [DEBUG] [com.wdpr.nge.media.msl.util.ListenerMediaRegistere d] - [Listener thread org.springframework.jms.listener.DefaultMessageLis tenerContainer#8-1 MessageId = ID:ffffffffcbed081a:15120004:13AD6DA8D83, Got Message: <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
[2012-11-06 11:52:58,289] [DEBUG] [com.wdpr.nge.media.msl.util.ListenerPhotopassClaim] - [Listener thread org.springframework.jms.listener.DefaultMessageLis tenerContainer#9-1 MessageId = ID:ffffffffcbed081a:15120004:13AD6DA8D83, Got Message: <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
[2012-11-06 11:52:58,289] [DEBUG] [com.wdpr.nge.media.msl.util.ListenerPhotopassClaim] - [Listener thread org.springframework.jms.listener.DefaultMessageLis tenerContainer#14-1 MessageId = ID:ffffffffcbed081a:15120004:13AD6DA8D83, Got Message: <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

Spring Version: 3.0.5
================

It appears as though you have 2 instances of the *container* rather than 2 consumers on that container, based on both of these bean ids in the log: DefaultMessageListenerContainer#9-1 and DefaultMessageListenerContainer#14-1 (for the same listener bean)

Are you sure there is not some additional configuration beyond what you are showing here? (another listener-container in an XML file being imported, or something similar)?

There is no other container configuration for the specific listener. Although I see 2 container instances with Sonic this is not the case with ActiveMQ. With AcitiveMQ as the log shows below, only one instance of the bean processes the message whereas with Sonic I see 2 bean instances processing the same message?

What is the pros and cons of configuring 1 container per listener vs one container for all listeners? Currently I have each listener configured in its own container.

[2012-11-06 14:27:00,037] [DEBUG] [com.wdpr.nge.media.msl.util.ListenerMediaRegistere d] - [Listener thread org.springframework.jms.listener.DefaultMessageLis tenerContainer#8-2 MessageId = ID:XXXXXXXX-55981-1352233598682-2:1:1:1:1, Got Message: <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
[2012-11-06 14:27:00,040] [DEBUG] [com.wdpr.nge.media.msl.util.ListenerPhotopassClaim] - [Listener thread org.springframework.jms.listener.DefaultMessageLis tenerContainer#9-2 MessageId = ID:XXXXXXXX-55981-1352233598682-2:1:1:1:1, Got Message: <?xml version="1.0" encoding="UTF-8" standalone="yes"?>