check out the following link at the Tomcat Developers mailing list
http://w4.metronet.com/~wjm/tomcat/2001/Jan/msg00322.html
This exception is discussed out there.
-Gokul
----- Original Message -----
From: "William Yeo" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, January 22, 2001 9:36 AM
Subject: [SERVLET-INTEREST] invalidate
> Hi all,
> Anybody knows what causes this exception? I try to do a
> session.invalidate() and this is what I get. I would appreciate if someone
> could tell me why this exception is thrown.
>
> java.lang.NullPointerException
> at
>
org.apache.tomcat.facade.HttpSessionFacade.invalidate(HttpSessionFacade.java
> :136)
>
> Regards
> William
>
>
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