Hi I use TCP load balancer between 3 machines with resin installed on all. I have a site where you can register as a user and post issues and have your own site etc. I use session id etc. When a registrered user is on his or her site and browse on his own site, all of a sudden the person can end up watching someone elses personal site that should only be able to be used by that person. If the first person e.g. browses his site, all of a sudden all the links on the site can "point" to another users site with the right user and password.
Can this have anything with loadbalancing between the machines??