Problem with overlapping users in Portal app

I'm working on struts portal app,I'm stuck with a prob when on some odd occasion the users data gets mixed up.

Consider the below scenario

1. two users log in first user A then User B.
2. at some point user a sees user b's data.
3. The problem gets resolved when user reloads the page

Could anyone please throw some light into this issue.

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.

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.

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?

--Rich