UnknownHostException in XP, not in Linux

Question

I'm having some problems with this code:
                    URL url = new URL(DODConstants.SYSTEM_DOMAIN+DODConstants.FILE_SEPARATOR+urltopdf);
                    HttpURLConnection connection = (HttpURLConnection)url.openConnection();
                    connection.connect();
                    System.out.println("Connection made:"+connection);
                    InputStream input = null;
                    try {
                        input = connection.getInputStream();
                    } catch (IOException ioe) {
                        JOptionPane.showMessageDialog(finishpanel,
                                "There was an error establishing a connection to the server.\nThis may be due to firewall restrictions.\nPlease contact system administator.",
                                "Error connecting to server",
                                JOptionPane.ERROR_MESSAGE
                    if(input != null) {
                        FileOutputStream out = new FileOutputStream(outputFile);
                        System.out.println("Starting read..");
                        int c;
                        while ((c = input.read()) != -1)
                            bytesRead++;
                            out.write(c);
                        System.out.println("Read finished, closing..");
                        input.close();
                        out.close();
                        finishpanel.setCursor(CUR_DEF);
                        dldialog.dispose();
                } catch (IOException e1) {
                    e1.printStackTrace();  // Just print the stack trace
                    JOptionPane.showMessageDialog(finishpanel,
                            "There was an error downloading or saving the PDF to the local hard drive.\nMake sure you have write access to the location when you want to save the PDF.",
                            "Error downloading file",
                            JOptionPane.ERROR_MESSAGE);
                    return;
                }I'm sitting at the same location, testing it in Linux and XP. In Linux it will system out this:
Connection made:sun.net.www.protocol.http.HttpURLConnection:http://(..)wilst, on XP this will be System.out'd:
java.net.UnknownHostException: (..)
     at java.net.PlainSocketImpl.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at sun.net.NetworkClient.doConnect(Unknown Source)
     at sun.net.www.http.HttpClient.openServer(Unknown Source)
     at sun.net.www.http.HttpClient.openServer(Unknown Source)
     at sun.net.www.http.HttpClient.<init>(Unknown Source)
     at sun.net.www.http.HttpClient.<init>(Unknown Source)
     at sun.net.www.http.HttpClient.New(Unknown Source)
     at sun.net.www.http.HttpClient.New(Unknown Source)
     at sun.net.www.http.HttpClient.New(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
     at no.xait.dod.customcomponents.FinishPanel$downloadFile.<init>(FinishPanel.java:1008)
     at no.xait.dod.customcomponents.FinishPanel$3.construct(FinishPanel.java:935)
     at no.xait.dod.utilities.SwingWorker$2.run(SwingWorker.java:110)
     at java.lang.Thread.run(Unknown Source)[domain replaced with (..)]
It can't be an Unknown Host, I'm sitting at the exact same location, and the software is working against that host most of the program.
So, anyone know what's going on here?

Answer 1

it cannot be an non-existing host as it works with linux... could be that the url-format is not supported in XP. printing of url.toString() before connecting and then trying to ping with that string might give a clue..
good luck!