error while shutting down multicast detector

[mazz]

Anyone ever see this NPE while shutting down the multicast detector?
I can't replicate this - its very rare and intermittent. But I definitely have seen this more than once.

 [java] 01:46:43,139 WARN [jboss.remoting.detection.multicast.MulticastDetector] Error removing server
 [java] java.lang.NullPointerException
 [java] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:653)
 [java] at org.jboss.remoting.detection.AbstractDetector.checkInvokerServer(AbstractDetector.java:525)
 [java] at org.jboss.remoting.detection.AbstractDetector$FailureDetector.run(AbstractDetector.java:583)
 [java] at java.util.TimerThread.mainLoop(Timer.java:432)
 [java] at java.util.TimerThread.run(Timer.java:382)

[mazz]

FWIW: after this NPE occurs, the only non-daemon thread left in my VM (and why my VM isn't dying when I want it to) is this:

Thread [SocketServerInvokerThread-127.0.0.1-1] (Suspended)
 waiting for: org.jboss.remoting.transport.socket.ServerThread (id=2)
 java.lang.Object.wait(long) line: not available [native method]
 org.jboss.remoting.transport.socket.ServerThread(java.lang.Object).wait() line: 429
 org.jboss.remoting.transport.socket.ServerThread.run() line: 293

[tom.elrod]

http://jira.jboss.com/jira/browse/JBREM-498