Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/17276#discussion_r107157471
--- Diff:
core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala ---
@@ -72,6 +72,18 @@ private[spark] class SortShuffleWriter[K, V, C](
val partitionLengths = sorter.writePartitionedFile(blockId, tmp)
shuffleBlockResolver.writeIndexFileAndCommit(dep.shuffleId, mapId,
partitionLengths, tmp)
mapStatus = MapStatus(blockManager.shuffleServerId, partitionLengths)
+ partitionLengths.foreach(writeMetrics.incBlockSizeDistribution(_))
+ if (mapStatus.isInstanceOf[HighlyCompressedMapStatus]) {
+ writeMetrics.setAverageBlockSize(
+ mapStatus.asInstanceOf[HighlyCompressedMapStatus].getAvgSize());
--- End diff --
in scala, `if( isInstanceOf) { asInstanceOf}` can be replaced by pattern
matching:
```scala
mapStatus match {
case hc: HighlyCompressedMapStatus =>
writeMetrics.setAverageBlockSize(hc.getAvgSize());
case _ => //no-op
}
```
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