[SPARK-28560][SQL][followup] change the local shuffle reader from leaf node to unary node#26250
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JkSelf wants to merge 2 commits into
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[SPARK-28560][SQL][followup] change the local shuffle reader from leaf node to unary node#26250JkSelf wants to merge 2 commits into
JkSelf wants to merge 2 commits into
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@cloud-fan @maryannxue Please help me review. Thanks. |
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Test build #112645 has finished for PR 26250 at commit
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Contributor
Author
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The failed test may be not related. Please help to re-test. Thanks. |
Contributor
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retest it please |
cloud-fan
reviewed
Oct 25, 2019
| override val id: Int, | ||
| override val plan: ShuffleExchangeExec) extends QueryStageExec { | ||
| override val plan: ShuffleExchangeExec, | ||
| var isLocalShuffle: Boolean = false) extends QueryStageExec { |
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let's avoid using mutable states when not necessary.
cloud-fan
reviewed
Oct 25, 2019
| } | ||
| // ShuffleExchanges introduced by repartition do not support changing the number of partitions. | ||
| // We change the number of partitions in the stage only if all the ShuffleExchanges support it. | ||
| if (!shuffleStages.forall(_.plan.canChangeNumPartitions)) { |
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We can change the logic of collecting shuffle stages:
def collectShuffleStages(plan: SparkPlan): Seq[ShuffleQueryStageExec] = plan match {
case _: LocalShuffleReaderExec = Nil
case stage: ShuffleQueryStageExec => Seq(stage)
case ReusedQueryStageExec(_, stage: ShuffleQueryStageExec, _) => Seq(stage)
case _ => plan.children.flatMap(collectShuffleStages)
}
val shuffleStages = collectShuffleStages(plan)
Contributor
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We should also remove the changes to |
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Author
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@cloud-fan @maryannxue update the coments. Please help me review. Thanks. |
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Test build #112748 has finished for PR 26250 at commit
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Contributor
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thanks, merging to master! |
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What changes were proposed in this pull request?
Why are the changes needed?
When make the
LocalShuffleReaderExecto leaf node, there exists a potential issue: the leaf node will hide the running query stage and make the unfinished query stage as finished query stage when creating its parent query stage.This PR make the leaf node to unary node.
Does this PR introduce any user-facing change?
No
How was this patch tested?
Existing tests