Tnx for the quick reply.
Reading about clusters I see all session data needs to be Serializable, in
our case this is not possible.
What we use today is a load-balancer, disconnecting one server for new
connections, waiting for all sessions to expire, upgrade, and put the server
back on the
You don't give much details about your problems. But I think you have some
long-living big datastructures which are hold in the session, so you can't
cluster your sessions.
You could redesign your application to make it more scalable. In the end that
is your problem, so it's the solution
