cloud-fan commented on a change in pull request #25420: [SPARK-28699][Core]
Cache an indeterminate RDD could lead to incorrect result while stage rerun
URL: https://github.com/apache/spark/pull/25420#discussion_r312983876
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryRelation.scala
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@@ -131,7 +131,7 @@ case class CachedRDDBuilder(
def hasNext: Boolean = rowIterator.hasNext
}
- }.persist(storageLevel)
+ }, isOrderSensitive = true).persist(storageLevel)
Review comment:
I don't quite get it. The `isOrderSensitive` flag is used to describe the
map function. Why the map function is order sensitive?
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