Hi, I hope the below log trace will give a proper insight about the problem. [DEBUG] - 08/29/07 12:42:42 org.jgroups.protocols.UDP --> sending msg to 192.168.100.166:44306 (src=192.168.100.173:52033), headers are {GMS=GmsHeader[LEAVE_REQ]: mbr=192.168.100.173:52033, UDP=[channel_name=TPFCoSRuntimeCache-Cluster-Stage2set2], UNICAST=[UNICAST: DATA, seqno=6]} [DEBUG] - 08/29/07 12:42:42 org.jgroups.protocols.UDP --> received (mcast) 75 bytes from 192.168.100.168:49614 [DEBUG] - 08/29/07 12:42:42 org.jgroups.protocols.UDP --> received (mcast) 75 bytes from 192.168.100.168:49614 [DEBUG] - 08/29/07 12:42:42 org.jgroups.protocols.UDP --> message is [dst: 224.10.11.12:46616, src: 192.168.100.168:49613 (2 headers), size = 0 bytes], headers are {UDP=[channel_name=TPFCoSProvCache-Cluster-Stage2set2], PING=[PING: type=GET_MBRS_REQ, arg=null]} [DEBUG] - 08/29/07 12:42:42 org.jgroups.protocols.PING --> received GET_MBRS_REQ from 192.168.100.168:49613, sending response [PING: type=GET_MBRS_RSP, arg=[own_addr=192.168.100.173:52030, coord_addr=192.168.100.168:49613, is_server=true]] [DEBUG] - 08/29/07 12:42:42 org.jgroups.protocols.UDP --> message is [dst: 224.10.11.12:46616, src: 192.168.100.168:49613 (2 headers), size = 0 bytes], headers are {UDP=[channel_name=TPFCoSProvCache-Cluster-Stage2set2], PING=[PING: type=GET_MBRS_REQ, arg=null]} [DEBUG] - 08/29/07 12:42:42 org.jgroups.protocols.PING --> received GET_MBRS_REQ from 192.168.100.168:49613, sending response [PING: type=GET_MBRS_RSP, arg=[own_addr=192.168.100.173:52030, coord_addr=192.168.100.168:49613, is_server=true]] [DEBUG] - 08/29/07 12:42:42 org.jgroups.protocols.UDP --> sending msg to 192.168.100.168:49613 (src=192.168.100.173:52030), headers are {PING=[PING: type=GET_MBRS_RSP, arg=[own_addr=192.168.100.173:52030, coord_addr=192.168.100.168:49613, is_server=true]], UDP=[channel_name=TPFCoSProvCache-Cluster-Stage2set2]} [DEBUG] - 08/29/07 12:42:42 org.jgroups.protocols.UDP --> sending msg to 192.168.100.168:49613 (src=192.168.100.173:52030), headers are {PING=[PING: type=GET_MBRS_RSP, arg=[own_addr=192.168.100.173:52030, coord_addr=192.168.100.168:49613, is_server=true]], UDP=[channel_name=TPFCoSProvCache-Cluster-Stage2set2]} [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.pbcast.GMS --> 192.168.100.173:52033 changed role to org.jgroups.protocols.pbcast.ClientGmsImpl [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.UDP --> closing sockets and stopping threads [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.FD_SOCK --> socket to 192.168.100.166:44306 was reset [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.FD_SOCK --> pinger thread terminated [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.UDP --> multicast receive socket closed [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.UDP --> multicast send socket closed [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.UDP --> multicast socket is closed, exception=java.net.SocketException: Socket closed [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.UDP --> multicast thread terminated [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.UDP --> socket closed [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.UDP --> unicast receiver socket is closed, exception=java.net.SocketException: Socket closed [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.UDP --> unicast receiver thread terminated [DEBUG] - 08/29/07 12:42:43 org.jgroups.protocols.UDP --> incoming packet handler terminating Thanks in advance, Sprightee View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4078993#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...