Please elaborate. As I read it, this boils down to a remote object being garbage collected before the RMI server releases its reference to it, which is obvious nonsense. So I'm probably not reading this statement the way you intended it.
Originally posted by BJ Grau:
[...] WeakHashMap works like a champ, even better than Unreferenced in my opinion because you get a much quicker resolution to a crashed client leaving a lock behind.