Hello, I use a jboss cache (TreeCache 1.4.0-SP1-jdk50) in order to share some result between two servers A(gtar1) and B(paplx2). My configuration is the same that described in that page : http://wiki.jboss.org/wiki/Wiki.jsp?page=JGroupsStackTCP my problem is during a network failure. The two node detect that there are alone. But when the network go up, the members never change so the two server are still alone. in order to simulate the network failure, I use this commande : iptables -A INPUT -s gtar1 -p tcp -j DROP ; iptables -A OUTPUT -d gtar1 -p tcp -j DROP ; iptables --list here is the trace of org.jgroups and org.jboss, the network was up at 11:34:20 : Server A: http://barbalum.free.fr/serveurA.txt Server B: http://barbalum.free.fr/serveurB.txt View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4028313#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...