One option for you to work around this, would be (roughly) something like this:

- Create a hashtable that is global to the webapp. - Create a hashtable for each session - Store the session hashtable in the application Hashtable and use the session id as key - if (session.isNew() && (<RequestedSessionId> != null)) get the session hashtable by using the RequestedSessionId and store it with the new SessionId as key. - otherwise get the session hashtable by using the current session id. - Store your session variables in the session hashtable - make shure to remove every thing from the application hashtable whenever a session gets destroyed.