Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/17774#discussion_r113497951 --- Diff: external/kafka-0-10/src/main/scala/org/apache/spark/streaming/kafka010/DirectKafkaInputDStream.scala --- @@ -140,11 +140,11 @@ private[spark] class DirectKafkaInputDStream[K, V]( lagPerPartition.map { case (tp, lag) => val maxRateLimitPerPartition = ppc.maxRatePerPartition(tp) - val backpressureRate = Math.round(lag / totalLag.toFloat * rate) + val backpressureRate = lag / totalLag.toFloat * rate --- End diff -- (Given your change, I think double becomes more reasonable than float.
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