Jboss集群:mod_cluster mod_cluster_proxy。导致apache崩溃

I am trying create a cluster of JBoss AS 7.1.1 (two instances in one machine with port offset as 100) in standalone mode. I am using apache (ver 2.2.22) with mod_cluster(ver 1.2.0) for load balancing. When I bring up both JBoss I could see the cluster view updated with both the nodes. But, I am getting the following error in Jboss:I am trying create a cluster of JBoss AS 7.1.1