give the folowing snippet a try:

 
    // For receiving
    @Override
    public void run() {
        boolean bProcessed;
        int loopCounter;
        IncomingMessageExecutor messageExecutor;
        byte[] buffer = new byte[MESSAGE_LENGTH];
 
        DatagramPacket p = new DatagramPacket(buffer, buffer.length);

        while (!socket.isClosed()) {
            try {
                loopCounter = 0;
                bProcessed = false;
                
                socket.receive(p);
                messageExecutor = new IncomingMessageExecutor(p);
                while(!bProcessed && loopCounter < 3)
                {
                	try
                	{
                		loopCounter++;
                		incomingExecutorService.execute(messageExecutor);
                		bProcessed = true;
                	}
                    catch (RejectedExecutionException ex)
               		{
                    	ex.printStackTrace();
                    	try
						{
							Thread.sleep(timeout / 3);
						}
						catch (InterruptedException e)
						{
							e.printStackTrace();
						}
               		}
                }
                p.setData(buffer);
            }
            catch (IOException e) {
                // no op. This happens if the socket gets closed by the destroy method.
            }
        }
    }

it is the the modified procedure run in the ipmessagecontrol.java file.

can you post the results of your tests here?

thanks
robert

it is hard to reproduce errors ...
a few hours back a segment ack was not send for one reason...

maybe you tell us what hw & sw environment you use

robert