Thank you for your reply, Denis.
I am sure the value I try to put in a session is not null. We used
Websphere and Tomcat 4.0.1 as our testing environment and the codes are
running OK. Only when we tried to use Tomcat3.3 giving us this error
message. We suspect either our setting in wrong or there is a bug in
Tomcat3.3.
Bill
"Denis Balazuc" <[EMAIL PROTECTED]> on 12/04/2001 02:38:37 PM
Please respond to "Tomcat Users List" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <[EMAIL PROTECTED]>
cc:
Subject: Re: Need help on Session's null pointer exception
Hi
You are simply trying to set a null value in a session, which is
forbidden.....something like session.setAttribute("HelloWorld", null);
I'm not sure this behaviour is specified in JSP specs though....
it's more because a Hashtable is used as the Map to store key=value session
attributes within Tomcat.
> I run a servlet on Tomcat3.3 and got the following error:
>
> java.lang.NullPointerException
> at java.util.Hashtable.put(Hashtable.java:380)
> at org.apache.tomcat.core.ServerSession.setAttribute(Unknown =
> Source)
> Can anyone kindly tell me what is wrong with my setting? I changed the
> expiration time for session in server.xml
> and I am sure the SessionIdGenerator is set too.
>
>
> Bill
>
>
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