------------------------------------------------------- | GMS: address is jboss171:32787 (additional data: 18 bytes) | ------------------------------------------------------- | 08:28:14,959 ERROR [UDP] exception=java.io.IOException: Network is unreachable, msg=[dst: 228.1.2.3:45566, src: jboss171:32787 (additional data: 18 bytes) (2 headers), size = 0 bytes], mcast_addr=228.1.2.3:45566 What's the problem with that? I running it on RedHat AH3 and Jboss4.05GA. I don't modify any thing in /server/all/.. .Is this my switch/router setting problem or others? Help my. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4040645#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...