Re: connection.close(), on a brokenConnection resolves my problem

"Multicast Discovery Agent Notifier" daemon prio=10 tid=0x000000000a82dc00 nid=0x6586 waiting on condition [0x0000000043188000..0x0000000043188b90]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00002aaab3cf20a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1978)
        at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:386)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1043)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1103)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:636)


It seems there is not any executor.shutdown() call in MulticastDiscoveryAgent Class .... Perhaps, it could be useful to add such a call in the stop() method ...