I think the data resides in the Application Scope.
After reloading the page for user B, what is the data for user A I think you will data of userB then .
This is an issue of session management, you have to see how portlet sessions are managed.
Joined: Mar 24, 2010
I've seen this problem before.
Make sure you are not running on the default hypersonic database. If that doesn't work, play around the session settings.
Joined: Dec 13, 2006
It's really hard to know; it could be a caching issue; a session management issue (i.e., sessions aren't getting destroyed when users log out); or an issue with the code in the application itself. Can you post any more details about your application?