One other questions related to optimistic locking...is there anything I can do to switch an existing cache configured with pessimistic locking to optimistic locking? For existing caches, it appears that it can load the objects because they do not have the appropriate data versioning. Anything that can be done outside of reading the entire cache and writing it out again in optimistic mode? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4175133#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...