MessagePostOffice.routeInternal() method may fail to release the readlock ------------------------------------------------------------------------- Key: JBMESSAGING-1954 URL: https://issues.jboss.org/browse/JBMESSAGING-1954 Project: JBoss Messaging Issue Type: Bug Components: Messaging Core Affects Versions: 1.4.8.SP11 Reporter: Yong Hao Gao Assignee: Yong Hao Gao Fix For: 1.4.8.SP12 This method first grabs the read lock and then release it in the finally block. However some statements are outside the try{}finally block so there is a chance the lock will never be released. The code is something like: private RouteResult routeInternal(...) throws Exception { //get the read lock lock.readLock().acquire(); ... //check inactive condition if (inactiveConditions.contains(condition)) { //look if this happens the readlock will NEVER be released!!!! throw new IllegalStateException("Destination " + condition + " not active!"); } try { //do somework ...... } finally { //release lock here lock.readLock().release(); } Once it happens, it will block any attempts to get the write lock, and also block any further attempts to get read lock. Make those threads blocking forever.