Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/2991#discussion_r20196611
--- Diff:
external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaInputDStream.scala
---
@@ -53,112 +46,17 @@ class KafkaInputDStream[
@transient ssc_ : StreamingContext,
kafkaParams: Map[String, String],
topics: Map[String, Int],
+ reliableReceiveEnabled: Boolean,
storageLevel: StorageLevel
) extends ReceiverInputDStream[(K, V)](ssc_) with Logging {
def getReceiver(): Receiver[(K, V)] = {
- new KafkaReceiver[K, V, U, T](kafkaParams, topics, storageLevel)
+ if (!reliableReceiveEnabled) {
+ new KafkaReceiver[K, V, U, T](kafkaParams, topics, storageLevel)
+ .asInstanceOf[Receiver[(K, V)]]
+ } else {
+ new ReliableKafkaReceiver[K, V, U, T](kafkaParams, topics,
storageLevel)
.asInstanceOf[Receiver[(K, V)]]
--- End diff --
If you make the ReliableKafkaReceiver extend Receiver[(K, V)], then this
`asInstanceOf` is not necessary.
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