I have resolved this issue by increasing the buffer size in cluster-service.xml: <UDP mcast_addr="${jboss.partition.udpGroup:228.1.2.3}" mcast_port="45566" | ip_ttl="8" ip_mcast="true" | mcast_send_buf_size="8000000" mcast_recv_buf_size="1500000" | ucast_send_buf_size="8000000" ucast_recv_buf_size="1500000" | loopback="false"/> Thanks for the help anyways. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4051751#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...