there are several same servers(process) on more than one server(machine) providing the same service.
we store session/context within the server(process), if the same client login, he will be directed to the very server service for him last time.
But, if a server(machine or process) down, the context/session within them will dispared, is any idea solving this problem?
Since session information is stores within the process ( and so in memory) there is no solution...unless you opt for less volatile storage