Dispatcher Problem in portal

Has anybody ever noticed that the Dispatcher is not smart enough to know if a Portal Node has hung or not. If for some reason the node is not responding, dispatcher is supposed to send the data to another node and not keep sending it to the same node.

This is such a simple thing but looks like this is not implemented. Is there some configuration that can be done to say if there is no response from a specific node, stop sending requests to that node.