Servlet not streaming PDF to browser properly

Question

Hello,
I have a servlet that is processing file uploads and streams the file upload to a browser. All works fine, except that for some reason the browser has it's own mind as to whether or not to load the PDF plugin. Word, excel, text, these files are 100% reliable. However, PDFs sometimes display, other times I get nothing in the browser window. No errors are logged in JBOSS/Apache. Here's a look at my code:
package com.iw.web;
import java.io.*;
import java.util.*;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.commons.fileupload.*;
public class FilePreview extends HttpServlet {
     public FilePreview() {
          super();
     public void destroy() {
          super.destroy(); // Just puts "destroy" string in log
          // Put your code here
     public void doPost(HttpServletRequest request, HttpServletResponse response)
               throws ServletException, IOException {
          boolean isMultipart = FileUpload.isMultipartContent(request);
          DiskFileUpload fu = null;
          fu = new DiskFileUpload();
          if(isMultipart)
               try
                    List fileItems = fu.parseRequest(request);
                    Iterator it = fileItems.iterator();
               while(it.hasNext())
                    //org.apache.commons.fileupload.
                    FileItem fi = (FileItem)it.next();
                    if (!fi.isFormField())
                         String contentType = fi.getContentType();
                    byte[] data = fi.get();
                         File file = new File(fi.getName());
                         response.setHeader("Content-disposition","filename=" + file.getName());
                    response.setContentType( contentType );
                    response.setContentLength(data.length);
                         //PrintWriter outStream = response.getWriter();
                         //outStream.println(file.getName() );     
                    ServletOutputStream sos = response.getOutputStream();
                    sos.write(data);
                    sos.close();
               catch(Exception e)
     public void init() throws ServletException {
          // Put your code here

Answer 1

UPDATE: I have finally figured out my problem and it has nothing to do with the servlet at all. What is in fact happening is that I have jboss running along side IIS and IIS forwards requests to JBOSS/Tomcat. For some reason the connector stops sending the file to tomcat, I suspect based upon file size or timeout something like that. Maybe a timeout config type thing that could be changed in the worker properties?