Session lost in WAS Express (iSeries)

["Bruce Jin" <jin007m@xxxxxxxxxxx>]

I configured WAS Express iSeries using all default settings. The following
code displays a new session Id every time I run this servlet.



HttpSession session = request.getSession(true);

out.println( "sessions.id" + " " + session.getId());



I added a line to set session expiration interval:



HttpSession session = request.getSession(true);

session.setMaxInactiveInterval(3600);

out.println( "sessions.id" + " " + session.getId());



The result is the same: a new session is displayed every time the servlet is
run.

The same servlet behaves correctly (session Id does not change) when run in
Tomcat (iSeries or PC).

Which switch in WAS Express controls this?

Thanks!