I'm going to migrate my flink cluster from 1.4.0 to 1.5.3, and I have been trying to map config file
to the latest version. I used to use these three configuration. Are they still needed in FLIP-6 mode?
Moreover, is any akka config still needed in FLIP-6 mode? Since I had a impression that FLIP-6
tried to get rid of akka and use its own rpc interface. Please correct me if I misunderstood. Thanks.