I'm thinking of something which can be swapped in place of the Pessimistic/OptimisticLockInterceptor (DistPess/OptLockInterceptors?) which in addition to obtaining local locks, uses a methodcall broadcast to replicate lock() methodcalls up remote stacks. Not the most efficient since this will have all sorts of scalability problems, but at least it gives us an initial impl of distributed locking in JBC. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4027289#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...