[Tomcat 4 b3] Problem with request forwarding in a servlet

[Leong Mun Wai <mu...@cyberway.com.sg>]

Hi,

There seems to be a problem with RequestDispatcher.forward() when used in a
Servlet. On the first load, the Servlet returnes a blank page. Forwarding to
a non-existent page does not return null either. On the second load, all
hell breaks loose and the Servlet goes into an infinite loop, finally ending
with a StackOverflow exception. The method works fine in a JSP though.

Here's my test code:

package demo.testing;

import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;

public class FwdTestServlet extends HttpServlet {

    public void service(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException {

        String fwdPage = req.getParameter("page");

        RequestDispatcher rd = req.getRequestDispatcher(fwdPage);
        if (rd == null) {
            throw new ServletException("Page " + fwdPage + " not found");
        }
        System.out.println("Forwarding to " + fwdPage);
        rd.forward(req, res);
    }
}

Thanks!
Mun Wai