Retrieving web server IP from remote servlet engine

[js...@patkai.com]

Hi!  I was wondering if anyone can help me with this problem.  I have a
setup that includes load balanced web servers with the Tomcat module, and
remote servlet engines on different machines.  From within a servlet, I
need to retrieve a possibly dynamic page from the specific web server that
dispatched the servlet request to the remote servlet engine.  Due to the
sessioning of non-servlet components on the site, IP load-balancing, and
other issues, I must make my HTTP request (for the page) to the original
server and not to another machine behind the load balancer.

I've looked at the Tomcat source, but I couldn't figure out how a servlet
would get the web server's IP address.  Is there a way to do this?  If
not, what modifications would I need to make to the Tomcat engine (without
changing anything on the actual web server machines?)

Thanks so much!
Joy