Handling a request while adding a node

system-design
Tags: #<Tag:0x00007f2427cc1990>

#1

How the system will handle request when adding a node. Say the request is suppose to be handled by node 3 while node 4 is being added and now the same request should be handled by node 4. What will happen if the request comes in before the re-hash is completed? Will it go to the old node or go to the new node where the data has not been transferred over yet