log.error("McastDiscovery1_4.sendDiscoveryRequest(): " + ex);
System.err.println("McastDiscovery1_4.sendDiscoveryRequest(): " + ex);
        void sendDiscoveryRequest(int ttl) {            DiscoveryRequest req;            byte[] buf;            DatagramPacket packet;            req = new DiscoveryRequest(local_addr, local_port);            System.out.println("--> " + req);            try {                buf = Util.objectToByteBuffer(req);                packet = new DatagramPacket(buf, buf.length, mcast_addr, mcast_port);                mcast_sock.send(packet);            } catch (Exception ex) {                log.error("McastDiscovery1_4.sendDiscoveryRequest(): " + ex);            }        }