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From Ivo Limmen <>
Subject RE: list of HttpSession objects
Date Wed, 31 Jan 2001 07:40:36 GMT
Do you always get the nullpointerexception or is it only when the user
closes the connection?
I am working on a similar problem, I want to see how many sessions are
active. I have tried to use a weak reference to each session object but it
didn't work because all the sessions are reused by Tomcat, so they don't


-----Original Message-----
From: TeamOn Crosswinds []
Sent: woensdag 31 januari 2001 5:33
Subject: list of HttpSession objects


We are moving to Tomcat3.2.1 and noticed a problem.
We monitor user-activity per web-server by keeping a list of HTTPSession
objects; we query this list to see the sessions active (and thereby some ser
information) at a given point.

With this version of tomcat, there seems to be this HTTPSessionfacade object
that has a 'realsession' object. this realsession object gets nuked at the
end of every request.

So, our list maintains a list of httpsessionfacade objects that do not have
any realsession objects associated with them, so we get nullpointerexception
when we try to read from these httpsession objects we maintain..

Is this a feature?
Is there any other way our management console can keep track of


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