xuanyuanking commented on a change in pull request #24110: [SPARK-25341][Core]
Support rolling back a shuffle map stage and re-generate the shuffle files
URL: https://github.com/apache/spark/pull/24110#discussion_r272803256
##########
File path:
core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
##########
@@ -75,9 +77,10 @@ private[spark] class SortShuffleManager(conf: SparkConf)
extends ShuffleManager
}
/**
- * A mapping from shuffle ids to the number of mappers producing output for
those shuffles.
+ * A mapping from shuffle ids to the tuple of number of mappers producing
output and
+ * indeterminate stage attempt id for those shuffles.
*/
- private[this] val numMapsForShuffle = new ConcurrentHashMap[Int, Int]()
+ private[this] val infoMapsForShuffle = new ConcurrentHashMap[Int, (Int,
Option[Int])]()
Review comment:
Thanks for reminding, I'll try to create a case of 2 running map stage based
on the description in https://issues.apache.org/jira/browse/SPARK-7308 and
check the behavior.
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