cloud-fan commented on a change in pull request #25295: [SPARK-28560][SQL]
Optimize shuffle reader to local shuffle reader when smj converted to bhj in
adaptive execution
URL: https://github.com/apache/spark/pull/25295#discussion_r333941162
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File path:
core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
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@@ -36,19 +36,35 @@ private[spark] class BlockStoreShuffleReader[K, C](
readMetrics: ShuffleReadMetricsReporter,
serializerManager: SerializerManager = SparkEnv.get.serializerManager,
blockManager: BlockManager = SparkEnv.get.blockManager,
- mapOutputTracker: MapOutputTracker = SparkEnv.get.mapOutputTracker)
+ mapOutputTracker: MapOutputTracker = SparkEnv.get.mapOutputTracker,
+ mapId: Option[Int] = None)
extends ShuffleReader[K, C] with Logging {
private val dep = handle.dependency
/** Read the combined key-values for this reduce task */
override def read(): Iterator[Product2[K, C]] = {
+ val blocksByAddress = (mapId) match {
Review comment:
`(mapId)` -> `mapId`
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