srowen commented on a change in pull request #31648:
URL: https://github.com/apache/spark/pull/31648#discussion_r582890410
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File path:
core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
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@@ -154,7 +154,7 @@ private[spark] class SortShuffleManager(conf: SparkConf)
extends ShuffleManager
metrics: ShuffleWriteMetricsReporter): ShuffleWriter[K, V] = {
val mapTaskIds = taskIdMapsForShuffle.computeIfAbsent(
handle.shuffleId, _ => new OpenHashSet[Long](16))
- mapTaskIds.synchronized { mapTaskIds.add(context.taskAttemptId()) }
Review comment:
@xuanyuanking do you have an opinion here? I think you wrote this piece
of the code.
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