I declared victory too early, I think. I am seeing this in the log. | 2006-11-03 15:58:04,850 ERROR [org.jgroups.blocks.GroupRequest] - exception=java.lang.IllegalArgumentException: java.lang.ClassNotFoundException: No ClassLoader | s found for: foo.MyBadObject | There is no exception stack trace. I don't know what this means. I am not seeing bad side-effect from this right now (i.e. items in the cache seem to get replicated ok). Why is the error thrown? How can I fix this? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3983148#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...