The perf03 log is showing missing responses to data gravitation requests. Due to timeout. Dominik, can you change the buddy replication config in the jboss-web-cluster.sar/META-INF/jboss-service.xml and see what happens: | <buddyCommunicationTimeout>20000</buddyCommunicationTimeout> | We want 20 secs instead of 2 secs. Manik, since this param drives the wait time for data gravitation, does it make sense to you that in general the value should be the same as SyncReplTimeout? I'd thought it was only used for the group formation messages; even there 2 secs is probably too low. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4091266#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...