I have a 2 server cluster. I set up a test where I put data into the cache on one server and then access the data from the cache on the other server in the cluster. With this attribute - ReplicationVersion included in my config file, data appears to no longer be replicated onto the other server. When I try to access data from the other cache on the other server, I get exceptions, null pointers. Removing the attribute, replication appears to function normally again. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4085117#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...