DO NOT REPLY [Bug 3736] New: - incorrect PathInfo on first invocation of servlet chain

[bugzilla]

DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG 
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://nagoya.apache.org/bugzilla/show_bug.cgi?id=3736>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND 
INSERTED IN THE BUG DATABASE.

http://nagoya.apache.org/bugzilla/show_bug.cgi?id=3736

incorrect PathInfo on first invocation of servlet chain

           Summary: incorrect PathInfo on first invocation of servlet chain
           Product: Tomcat 4
           Version: 4.0 Final
          Platform: PC
        OS/Version: Windows NT/2K
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Catalina
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


consider two servlets, S3 and S4 (source below) where S3 includes S4, 
determining S4's name from the PathInfo, e.g. the chain is invoked as follows 
http://localhost/servlet/S3/servlet/S4

on the very first invocation S4 receives the incorrect ServletPath and PathInfo.  
the example output is as follows:

Servlet S3
Servlet Path: /servlet/S3
Path Info: /servlet/S4
Servlet S4
Servlet Path: /servlet/S4
Path Info: null

note that if S3 had forwarded to rather than included S4, S4's output would be 
correct.

on all subsequent invocations the correct info is received:

Servlet S3
Servlet Path: /servlet/S3
Path Info: /servlet/S4
Servlet S4
Servlet Path: /servlet/S3
Path Info: /servlet/S4

this works as expected with TC3.2.3

S3.java:

package test;

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

public final class S3
extends HttpServlet
{
        public void service(HttpServletRequest req, HttpServletResponse res)
        throws ServletException, IOException
        {
                res.getWriter().println("Servlet S3");
                res.getWriter().println("Servlet Path: " + 
req.getServletPath());
                res.getWriter().println("Path Info: " + req.getPathInfo());
                
                getServletContext().getRequestDispatcher(
req.getPathInfo()).include(req, res);
        }       
}

S4.java:

package test;

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

public final class S4
extends HttpServlet
{
        public void service(HttpServletRequest req, HttpServletResponse res)
        throws ServletException, IOException
        {
                res.getWriter().println("Servlet S4");
                res.getWriter().println("Servlet Path: " + 
req.getServletPath());
                res.getWriter().println("Path Info: " + req.getPathInfo());
        }       
}