Sun Java System Access Manager 7.1 Release Notes

Using HttpSession with third-party web containers

The default method of maintaining sessions for authentications is “internal session” instead of HttpSession. The default invalid session maximum time value of three minutes is sufficient. The amtune script sets the value to one minute for Web Server or Application Server. However, if you are using a third-party web container (IBM WebSphere or BEA WebLogic Server) and the optional HttpSession, you might need to limit the web container's maximum HttpSession time limit to avoid performance problems.