Session becoming NULL

Question

I am working on struts application.
When we restart Tomcat, it's working fine.
After few days, session becoming null in particular area of the application. Otherthan that area, application is working fine. If we restart Tomcat, then it's works fine.
There is no problem with database (MySQL). Previously, we started db with max_allowed_packets=50M as default.
struts-config.xml contains the following content:
<data-sources>
      <data-source key = "jdbc/RFS">
         <set-property property = "password" value = "rfs" />
         <set-property property = "minCount" value = "1" />
         <set-property property = "maxCount" value = "50" />
         <set-property property = "user" value = "rfs" />
         <set-property property = "driverClass" value = "com.mysql.jdbc.Driver" />
         <set-property property = "description" value = "" />
         <set-property property = "url" value = "jdbc:mysql://172.23.7.64:3306/rfs" />
         <set-property property = "readOnly" value = "false" />
         <set-property property = "autoCommit" value = "true" />
         <set-property property = "loginTimeout" value = "" />
      </data-source>
      </data-sources>Please let me know the usage of loginTimeout.

Answer 1

Hi,
Session Create Code in Login file
HttpSession hs = req.getSession( true );
hs.setAttribute( "user", lb.getUsername() ); // username() is ur unique id
Session Tracking code in all file
               HttpSession hs=request.getSession();
               if ( hs == null || hs.getAttribute( "user" ) == null )
                    response.sendRedirect ( "./index.jsp" );
Logout code
HttpSession hs=req.getSession(false);
               hs.setAttribute( "user", null );
               hs.invalidate();
               res.sendRedirect ( "./index.jsp" );
// I hope this snippet will help u..