Hi team, I have one operator that is connected to another 9 downstream operators using rebalance. Each operator has 150 parallelisms[1]. I assume each message in the upstream operation is sent to one of the parallel instances of the 9 receiving operators so the total bytes sent should be roughly 9 times of bytes received in the upstream operator metric. However the Flink UI shows the bytes sent is much higher than 9 times. It is about 150 * 9 * bytes received[2]. This looks to me like every message is duplicated to each parallel instance of all receiving operators like what broadcast does. Is this correct?
[1] https://imgur.com/cGyb0QO [2] https://imgur.com/SFqPiJA -- Regards, Tao
