Github user xuanyuanking commented on a diff in the pull request: https://github.com/apache/spark/pull/20689#discussion_r174667490 --- Diff: external/kafka-0-10-sql/src/main/scala/org/apache/spark/sql/kafka010/KafkaContinuousReader.scala --- @@ -164,7 +164,15 @@ case class KafkaContinuousDataReaderFactory( startOffset: Long, kafkaParams: ju.Map[String, Object], pollTimeoutMs: Long, - failOnDataLoss: Boolean) extends DataReaderFactory[UnsafeRow] { + failOnDataLoss: Boolean) extends ContinuousDataReaderFactory[UnsafeRow] { + + override def createDataReaderWithOffset(offset: PartitionOffset): DataReader[UnsafeRow] = { + val kafkaOffset = offset.asInstanceOf[KafkaSourcePartitionOffset] + assert(kafkaOffset.topicPartition == topicPartition) --- End diff -- Got it.
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