I have found the below excerpt from some document:
The Processing Mode should be set to stateless if the services in this package can be executed by any requestor in a pool of requestors without regard to processing that the requestor performed earlier; otherwise, select stateful.
Can you point us to any usecase where we use statefull vs stateless services?
***Edited by Moderator: Pallavi to update platform capability tags***
Also, If we have to maintain the session state across requests.. The requestor holding the clipboard data will it wait for all the requests to come and the service call which has the "End requestor when done" selected.