JBM Clustering Issue

[venukb]

JBoss - 4.2.3 GA
JBM - 1.4.2GA SP!
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The Postoffice service in JBM has the following attribute

<!-- The JGroups group name that the post office will use -->

 <attribute name="GroupName">${jboss.messaging.groupname:MessagingPostOffice}</attribute>

Documentation says that nodes in a JBM cluster should have the same Group Name.
Thats what we wanted and we set the value by passing the name as a JVM argument

-Djboss.messaging.groupname=ha1messaging

We have 4 JBoss Instances running in the same subnet; 2 clusters (with each cluster having 2 nodes)

JBoss and other services (HTTP clustering/SFSB clutering etc) can read the -g (jboss.partition.name) param value and use it to form the proper cluster. (The Mcast IP and port are unchanged; Jgroup messages are dropped based on the JGroups group name)

However JBM doesnt seem to consider the value passed in jboss.messaging.groupname and all the 4 nodes form a Postoffice cluster !

Is this a known issue? (If JBM discards group name, we can try setting unique MCAST IP/Port, but this isn't clean)

Let us know if there is any other way of resolving this issue?

Thanks
Venu

[gaohoward]

This is probably related to this code:

// http://jira.jboss.org/jira/browse/JBMESSAGING-1244
// if the channelPartitionName is set, we use it to identify the control and
// data channels. Otherwise, we fall back to use groupName
String channelName = (channelPartitionName == null)? channelPartitionName : groupName;

So you need to set the property channelPartitionName in the config file in order to use groupName.

[venukb]

Thanks howard :)

That worked and is more clean than setting the multicast ip/port