public class UIDRoutingContextTracker
extends java.lang.Object
For any single UID, we should only route to the same node once, even if
the request comes back to us in a loop. Loop detection with rejection is
dangerous, and we can't easily disentangle the various failure modes, so
we allow a request to loop back to us and then relay it forward, RNFing
if appropriate. So we keep a UIDRoutingContext for each UID that has live
UIDTag's.