Github user koeninger commented on a diff in the pull request: https://github.com/apache/spark/pull/14026#discussion_r69828832 --- Diff: external/kafka-0-10/src/main/scala/org/apache/spark/streaming/kafka010/ConsumerStrategy.scala --- @@ -79,8 +81,71 @@ private case class Subscribe[K, V]( def onStart(currentOffsets: ju.Map[TopicPartition, jl.Long]): Consumer[K, V] = { val consumer = new KafkaConsumer[K, V](kafkaParams) consumer.subscribe(topics) - if (currentOffsets.isEmpty) { - offsets.asScala.foreach { case (topicPartition, offset) => + val toSeek = if (currentOffsets.isEmpty) { + offsets + } else { + currentOffsets --- End diff -- The consumer needs to be in a state that poll() is safe to call on it. With auto offset reset none, a consumer with no positions will throw if poll is called. You're right that the driver knows the recovered positions, this is more about working around consumer state.
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