Trying to get simple UDP Server to work

Question

Hello
I am trying to get a simple UDP Server to work. I have written the Server and a Client and upto a point the program works. I can make a request from the client and the Server sees this and sends its own response. The problem is the client doesn't seem to receive this response. The error I get is 'java.net.SocketTimeoutException: Receive timed out'.
Below is the code for the Server;
        while (true) {
            try {
                for (i = 0; i < sendBuffer.length; i++)
                    sendBuffer[i] = 0;
                for (i = 0; i < receiveBuffer.length; i++)
                    receiveBuffer[i] = 0;
                serverSocket.receive(receivePacket);
                telemetryRequest = new String(receivePacket.getData(), 0, receivePacket.getLength());
                jTextFieldServerStatus.setText(telemetryRequest);
                receivePacket.setLength(receiveBuffer.length);
                sendTelemetry = new String("airspeed=" + Math.round(Float.valueOf((airspeed))));
                sendBuffer = sendTelemetry.getBytes("ASCII");
                sendPacket = new DatagramPacket(sendBuffer, sendBuffer.length, clientIPAddress, clientPort);
                sendPacket.setData(sendBuffer, 0, sendBuffer.length);
                serverSocket.send(sendPacket);
            } catch (IOException e) {
                jTextFieldServerStatus.setText("Error on server socket");
                return;
        }I have tested the Client against another UDP Server and this works, so I believe it is something in my Server code causing the problem.
If anyone has a solution to this problem I would really appreicate their help.
Regards
Gary

Answer 1

Cross post:
http://forum.java.sun.com/thread.jspa?threadID=792481&messageID=4503960#4503960