Race condition in streams/microservices/OrdersService.java

[NorthFuture]

In the function fetchLocal it's being checked if the order is in the store: if not a callback is being put in the outstandingRequests hashmap. in this way when a message arrive the maybeCompleteLongPollGet can invoke the callback and complete the function.

However after testing the presence of the order in the store (line 200) the message related to that order might have arrived in the meanwhile, but the callback is not yet int the hasmap, so the response is never completed.