[core] Possible memory leak in raylet when a required object takes a long time to fetch #14458
Description
What is the problem?
Ray version and other system information (Python version, TensorFlow version, OS): v2.0dev
When an object is needed on a node, the raylet periodically pings its owner to check that the owner is still alive. This is a long-polling RPC that can potentially stay in the raylet's outstanding requests for a long time. This may be related to #14322, but I need to do some investigation to confirm.