My question is: I have a DoSomethingServlet to created a MyBean object and put it into session object, then DoSomethingServlet foward request to showMyBean.jsp page the show the result. At the beginning of showMyBean.jsp I coded the following: ============ <jsp:useBean id="myBean" class="package.MyBean" cope="session"/> <%if(session.getAttribute("myBean") != null){ myBean = (MyBean)session.getAttribute("myBean"); if(myBean == null){ System.out.println("The sessin object is null now") %> <jsp:forward page="/MyApp/servlet/DoSomethingServlet" /> ============ I check the session myBean if there is one, then I get the MyBean object from the session. Then check if the MyBean object is null then I foward request to the DoSomethingServlet to do something and create MyBean object and put into session object again. ====== The problem occurs when I have not touched the showBean.jsp page in the browser for certain minutes (30? 20? minutes), the session may be time out, and I click a link in the jsp page for this showMyBean.jsp page. The result is a blank page show in the broswer instead of the new showMyBean.jsp page and I check console which show "The sessin object is null now" message. My question is why <jsp:forward page="/MyApp/servlet/DoSomethingServlet" /> doesn't work for me at this situation??? How can I get the new showMyBean.jsp page, i.e. how can I invoke DoSomethingServlet again? Anything wrong??? If any one, can tell me how to solve this problem. It would be very appriciated! Thank you in advance! J. Long
William Brogden
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The default timeout for HttpSession objects in Tomcat and JRun is 30 minutes - this may be a pretty widespread convention. I think you need to establish an error page for your jsp so you can get more information than just a blank screen. Bill
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