JSP sharing session among users

Hey all,
I got a simple but important problem to pass by you all.
:-) I wrote an intranet application using jsp and servlets. The issue I found is at login, the userid displayed is from a prior session. For example, I login in the morning and then leave. Another user logs in in the afternoon and sees the userid field with my userid.
I thought I would keep the value of the userid for each user, but it seems the server is keeping the session. I store the userid in a hash table and then store it in a HttpSession and pass the hash table around (much like a context). I thought HttpSession was unique for every user, so I figured GC would take out the prior session along with the data contained in it. Any ideas?
I am in QA now and hope to be implemented by Tuesday. What I did to clear out the userid field was to remove the code that preloads that field from the session. It works, but it concerns me that maybe other data might be shared.
Thanks,
Patrick

Session's are not shared across users. Actually
sessions are mainitained by a variety of ways and one
of the ways is cookies in the browser.
If i understand you right , this problems occurs in
the same machine and may be same instance of the
browser.
You might need to do the following...........
1) Make the settings in your app server so that the
session expires after some time. The session should
not be active for ever.=== The session does time out after 30 minutes.
2) Second is that have a login page and in that page
always clean the session variable.=== I get the session from request.getSession(). Do === you call invalidate() on the HttPSession object to === initialize it or just session = null?
3) Further make sure that none of the variable you use
in the JSP is in application scope ie
<%!
int session_id
%>
In this example this variable is in application scope
outside the jspservice function. And since the
servlet(ie jsp) is called in multiple threads , you
will get into the whole issue of synchronization and
stuff. So be care about this scope ...
=== I know I don't use session ids. I see the need for === them, but not in the scope of this app.
I think this would solve the problem.Thanks,
Patrick

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