Ok, maybe I've found it. Look at this: | queue = new PriorityBlockingQueue<QueueItem>(result.size(), new Comparator<QueueItem>() { | public int compare(QueueItem o1, QueueItem o2) { | // This will cause the queue to be sorted in the inverse natural order | // i.e. higher numerical value of priority attribute gives higher priority | return -o1.getPriority().compareTo(o2.getPriority()); | } | }); | The stacktrace says the problem is to instanciate CallHandlerActionBean$1, i.e. an anonymous inner class of CallHandlerActionBean. I had searched for it before but didn't find it until now. This kind of constructions are quite common in example code but obviously easy to blow a big hole in the foot... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4071914#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...