Session already invalidated

[Dilip kumar]

Hello All -

I'm not able to find out what's causing this error.


type : Exception report

message :

description : The server encountered an internal error () that prevented it from fulfilling this request.

exception :

java.lang.IllegalStateException: getAttribute: Session already invalidated
org.apache.catalina.session.StandardSession.getAttribute(StandardSession.java:984)
org.apache.catalina.session.StandardSessionFacade.getAttribute(StandardSessionFacade.java:109)
Main.doGet(Main.java:60)
javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75)


note : The full stack trace of the root cause is available in the Apache Tomcat/5.5.8 logs.


Am I using the session wrong way ? Really appreciate any suggestions. Thanks

    
public class Main extends HttpServlet {
 
HttpSession session;
 

public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
 
if (session == null) {
session = req.getSession(true);
 
// more code
} else {
 
// more code
}
}
 
}
 

[David O'Meara]

You problem is that the session is an instance variable, there is only one variable and all of your rerquests end up sharing it. Move it inside the method instead so there will be one per thread instead.

Dave

[Dilip kumar]

Dave, Thanks for the responese.

I'm little bit puzzled about sessions. I would like to set some default values to session variables when the user first time comes to the web page via servlet. Later the values for session variables chaanges based on user selecting differing parameters. If I move HttpSession session; inside the
goGet how I do I know whether it is new seesion of existing session.

Thanks again.

[Dilip kumar]

I will try

HttpSession session = req.getSession(true);

if (session.isNew()) {

} else {

}

Thanks