Hi,
Using JBoss 5.0.0.GA and its JBM I've seen the following exception
Exception in thread "Timer-2" java.lang.IllegalStateException: org.jboss.remoting.ConnectionValidator.run() should not be called directly; use org.jboss.remoting.ConnectionValidator.addConnectionListener() instead. at org.jboss.remoting.ConnectionValidator.run(ConnectionValidator.java:289) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462)