How to maintain/preserve session between applications on same AS?

I have an AS with two applications deployed on it.

One bounces to the other to do a login workflow, stores a user data object in the session, then bounces back to the first application - again, all within the same AS.

I am losing the session data when I bounce back from the second application to the first - the user data object is not there (null) when I try to access it.

Is there any means of preserving or maintaing sessions or session data between applications on the same AS?

Thanks for your time.

AS?

Perhaps, application server? It'd be best to spell it out.

Which one?

WebLogic 10.3 AKA 11

I've modified my applications since the initial posting from response.redirects to servletContext.getRequestDispatcher(url_string).forward(request,response) with no change - I'm still losing the session between the applications.

Thanks for your time.