Github user tdas commented on the pull request: https://github.com/apache/spark/pull/3798#issuecomment-72761134 In terms of number of classes, the abstract KafkaRDD is essentially replacing HasOffsetRanges. There is no need for this HasOffsetRanges trait that gets used only (assuming createRDD returns RDD[(K,V)]) inside ``` DStream.foreachRDD { rdd => val offsetRanges rdd.asInstaneOf[HasOffsetRanges].getOffsetRanges() .... } ```
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