i am trying to configure jgroups for use in gridgrain, not jboss cluster - but i hope it's ok to ask here. i've tried googling for this message but was unable to find a lot, any hint would be great. here is my sad story: i get a couple of notes sucessfully connected, but as soon as one of them wants to talk to other i get this exeption: [it's in the log of 10.15.19.33 and 10.15.19.142 is the only initial_host] [is both my TCP start_port and the port of initial_hosts record, is this valid? ] java.lang.IllegalArgumentException: 10.15.19.142:7800 is not a member of the group [10.15.19.142:7801, 10.6.179.52:7800, 10.6.179.52:7801, 10.15.19.33:7800, 10.15.19.33:7801] (enabled_members=[]) at org.jgroups.protocols.UNICAST.down(UNICAST.java:305) at org.jgroups.protocols.pbcast.STABLE.down(STABLE.java:317) at org.jgroups.protocols.FRAG.fragment(FRAG.java:230) at org.jgroups.protocols.FRAG.down(FRAG.java:112) at org.jgroups.protocols.pbcast.GMS.down(GMS.java:837) at org.jgroups.stack.ProtocolStack.down(ProtocolStack.java:375) at org.jgroups.JChannel.downcall(JChannel.java:1366) at org.jgroups.mux.MuxChannel.downcall(MuxChannel.java:365) at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.down(MessageDispatcher.java:760) at org.jgroups.blocks.RequestCorrelator.sendRequest(RequestCorrelator.java:301) at org.jgroups.blocks.GroupRequest.doExecute(GroupRequest.java:484) at org.jgroups.blocks.GroupRequest.execute(GroupRequest.java:211) at org.jgroups.blocks.MessageDispatcher.castMessage(MessageDispatcher.java:438) at org.jgroups.blocks.MessageDispatcher.castMessage(MessageDispatcher.java:384) at org.jgroups.blocks.MessageDispatcher.castMessage(MessageDispatcher.java:363) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4173415#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...