Revoker.java

LockIdentifier lock = revokes.take();
                OwnerId ownerId = lock.getOwnerId();
                LockCacheConnector lockCache = (LockCacheConnector) LocateRegistry.getRegistry(
                        ownerId.getAddress().getHostAddress(), ownerId.getPort()
                ).lookup(DefaultLockCache.BINDING_NAME);
                lockCache.revoke(lock.getLockId());