File Upload Servlet Error

[Daryani Santosh]

I am trying to upload a file to a server using a HTTP Post Client.
At the client side I have a Java program that reads it and posts it to the
servlet.
The servlet reads the incoming stream of data and writes it to the disk. Simple
enough.

This works like a charm most of the times , but in certain cases when the file
size exceeds 4-5 Meg , it fails.
I tweaked it a little bit but still could'nt figure out what's causing it to
fail.

Any help , suggestion or pointer is appreciated.

Here's the code

Client Side

     String url ="http://benetestw2k/servlet/UploadServlet?filename="+args[0];
     URL theURL = new URL(url);

      HttpURLConnection theConnection =
(HttpURLConnection)theURL.openConnection();
      theConnection.setDoOutput(true);
      theConnection.setUseCaches(false);

      PrintWriter out = new PrintWriter(theConnection.getOutputStream());

      // Read File

      String fileContents = "";
      String line = null;
      FileReader f1 = new FileReader(args[0]);
      BufferedReader theReader = new BufferedReader(f1);

      // Send each line to Servlet
      while ((line = theReader.readLine()) != null)
      {
        out.println(line);
      }

Server Side
  public void doPost (HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
  {
    BufferedWriter uploadFile = null;

    filename = request.getParameter("filename");
    String uploadFileName = uploadDirectory + '\\' + filename;

    try
    {

     // Get the Input Stream
      ServletInputStream input = request.getInputStream();
      BufferedReader theReader =
      new BufferedReader(new InputStreamReader(input));

      uploadFile = new BufferedWriter(new FileWriter(uploadFileName));

      String line = null;
      while ((line = theReader.readLine()) != null)
      {
        uploadFile.write(line);
        uploadFile.newLine();
       }


Thanks in advance
Santosh

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