Coordinating Session Access

Make sure that multiple threads don’t simultaneously modify the same session object in conflicting ways.

This is especially likely to occur in SIP applications where multiple SIP sessions share a SIP application session, and in converged applications where requests for the same session occur through HTTP and SIP protocols. It is likely to occur in pure web applications that use HTML frames where multiple servlets are executing simultaneously on behalf of the same client. A good solution is to ensure that one of the servlets modifies the session and the others have read-only access.