RequestDispatcher issue in app

Hello there,
I am trying to invoke a jsp file named subscription.jsp. subscription.jsp has a submit button. When the button
is clicked it calls the display.jsp page displays the passed ID's in url request. I am invoking the jsp file as
http://localhost:8080/subscribe/subscription?userid=1&wikiid=01
When the execution comes to dispatcher.forward(req, res) I am entering into an infinite loop and the browser
just displays stackoverflowException. The RequestDispatcher code looks all fine to me but I cannot figure out
what is the issue here.
I am using JBOSS server. My server log file has tons of contents.
Servlet Code:

Oops! mistake, last post got posted without code. Here is the code the I wrote.
Servlet Code:
     public void service (HttpServletRequest req, HttpServletResponse res) throws ServletException,
IOException{
               String pathinfo = req.getPathInfo();
               System.out.println("PATH INFO: "+pathinfo);
               String jsp = null;
               if (pathinfo.equals("/subscription")){
                    System.out.println("INSIDE IF");
                    String userid = req.getParameter("userid");
                    String wikiid = req.getParameter("wikiid");
                    System.out.println("USERID: "+userid +"/n"+"WIKIID: "+wikiid);
                    SubscriptionBean subscribe = new SubscriptionBean(userid,wikiid);
                    System.out.println("Instanciate bean");
                    subscribe.print();
                    //TO DO:later move this
                    HttpSession session=req.getSession();
                    session.setAttribute("Subscription",subscribe);
                    jsp = SUB_JSP;
                    System.out.println("END OF IF");
               else {
                    System.out.println("NOTHING");
               //forwarding the request to jsp pages
               RequestDispatcher dispatcher;
               dispatcher = getServletContext().getRequestDispatcher("/"+jsp);
               dispatcher.forward(req, res);
JSP page:
subscription.jsp
<html>
<%-- To display subscription button --%>
<body>
<FORM METHOD="post" ACTION="display.jsp">
     <input type="submit" name="submit" value="Subscribe">
</FORM>
</body>
</html>
display.jsp
<html>
<jsp:useBean id="subscribeBean" class="com.corporate.wiki.SubscriptionBean" scope="request" />
<BODY>
     <h1>Display page</h1>
     <BR>
     <H3>Wiki page id
     <jsp:getProperty name="subscribeBean" property='user_id'/>
     </H3>
     <BR><BR>
     <jsp:getProperty name="subscribeBean" property='wiki_page_id'/>
</BODY>
</html>Can anyone guide me on what is the issue here? Why I am getting this error.
Thanks,
S

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