if(log.isInfoEnabled()) log.info("sending diag response to " + sender + ":" + port);
if(log.isDebugEnabled()) log.debug("sending diag response to " + sender + ":" + port);
    void handleDiagnosticProbe(InetAddress sender, int port) {        try {            byte[]      diag_rsp=getDiagResponse().getBytes();            DatagramPacket rsp=new DatagramPacket(diag_rsp, 0, diag_rsp.length, sender, port);                if(log.isInfoEnabled()) log.info("sending diag response to " + sender + ":" + port);            sock.send(rsp);        }        catch(Throwable t) {            if(log.isErrorEnabled()) log.error("failed sending diag rsp to " + sender + ":" + port +                                                       ", exception=" + t);        }    }