How to start a new session in JSP?

[zalek]

Hello,
I wrote a JSP application - I want to start a new session on my first
page. I wrote a code:
<%
session.invalidate();
session = request.getSession(true);
%>

I am getting a long error starts like that:

[8/23/08 9:34:17:453 EDT] 0000003a ServletWrappe E SRVE0068E: Could
not invoke the service() method on servlet /Select_env.jsp. Exception
thrown : java.lang.IllegalStateException:
Session Object Internals:
id : 9r0eE_QJbYsM_m5irgLbanq
hashCode : 1516111642
create time : Sat Aug 23 09:29:53 EDT 2008
last access : Sat Aug 23 09:29:53 EDT 2008
max inactive interval : 1800
user name : anonymous
valid session : false
new session : false

overflowed : false


non-serializable app specific session data : {}
serializable app specific session data : {}


Any idea what I did wrong?

Thanks,

Zalek