"bstansberry" wrote : First, ha-server-cache-spi and ha-server-cache-jbc have nothing to do with the ejb3 project. They define an spi for the AS project's use of JBC (e.g. web session replication), not ejb3's. Ah, sorry for the confusion. I'd thought this replaced the "cluster-dev" branch noted by the Wiki, which Brian now points out is "jbossas/projects/ejb3/branches/cluster-dev/". I'll take some time to look at this to see the differences between here and the prototype work in ejb3-cache. From speaking with Carlo I'd understood ejb3-cache to be a potential implementation (which we're not using yet in EJB3 Core). S, ALR View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4185860#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...