Github user sryza commented on a diff in the pull request:
https://github.com/apache/spark/pull/4067#discussion_r23284251
--- Diff:
core/src/main/scala/org/apache/spark/shuffle/hash/BlockStoreShuffleFetcher.scala
---
@@ -82,7 +82,15 @@ private[hash] object BlockStoreShuffleFetcher extends
Logging {
SparkEnv.get.conf.getLong("spark.reducer.maxMbInFlight", 48) * 1024
* 1024)
val itr = blockFetcherItr.flatMap(unpackBlock)
- val completionIter = CompletionIterator[T, Iterator[T]](itr, {
+ val itr2 = new AfterNextInterceptingIterator[T](itr) {
+ val readMetrics =
context.taskMetrics().createShuffleReadMetricsForDependency()
--- End diff --
Nit: take out parens after `taskMetrics`
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