[WEB400] servlet scope in webapp

["Patrick Goovaerts" <patrick@xxxxxxxxxxxxx>]

I have a webapp which has following:
index.html
info.jsp
detail.jsp
databean.class
controllerServlet.class

- The webapp is running under WebSphere Advanced 4.0.7
- The controllerServlet is added to the
  Servlet and JSPs list of the webapp.
     (no autostart)
- The databean has 'scope=session' in jsp.
- The controllerServlet has his own work-copy of the databean

The controllerServlet is accessed by URL as follows:
<form name="BLWS1" action="BLWController" method=POST onSubmit="return
testaction(action);">
and following is done (in short)
1) I copy the session-databean into the controller-databean.
2) I do my stuff
3) copy controller-databean to session-databean
4) launch jsp (i.e. detail.jsp)

My application is working ok but...
When more users run the application it goes wrong.
It suspect that (some) values in the controller-databean are changed by 2nd
requester.

I checked the WebServer log and I can see that users actually have different
web-session-id's.  However, at least 3 variables from the session-databean
were changed...

IMHO, every user which loads a webapplication got his own version of
java-classes as well as jsp's, session etc, etc...

Any idea what to check, where to look?


thanks.