How to configure default session duration
In the uPortal web application's web.xml:
Configure the default session timeout to your desired session timeout. E.g., for hour-long sessions:
Considerations in deciding upon a default session duration
Longer default sessions tend to result in better user experiences, with users more able to wander off and come back and continue to use the portal as rendered in their browser window.
Shorter default sessions reclaim resoures faster from abandoned uPortal sessions.
Providing a prominent "logout" button may help users to explicitly end their sessions and thereby help you to reclaim their resources sooner, but don't count on it: logout button usage is usually very low.