Looks like you've got HttpSession replication traffic being handled by your HAParition channel. These should be separate and distinct channels. Make sure the UDP configurations in cluster-service.xml and tc5-cluster.sar/META-INF/jboss-service.xml are using different values for mcast_port. Also make sure that the value of the "PartitionName" attribute in the cluster-service.xml ClusterPartition mbean is different from the "ClusterName" value in the tc5-cluster.sar's file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3972761#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...