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https://issues.apache.org/jira/browse/SPARK-47148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-47148.
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Fix Version/s: 4.0.0
Resolution: Fixed
Issue resolved by pull request 45234
[https://github.com/apache/spark/pull/45234]
> Avoid to materialize AQE ExchangeQueryStageExec on the cancellation
> -------------------------------------------------------------------
>
> Key: SPARK-47148
> URL: https://issues.apache.org/jira/browse/SPARK-47148
> Project: Spark
> Issue Type: Bug
> Components: Shuffle, SQL
> Affects Versions: 4.0.0
> Reporter: Eren Avsarogullari
> Assignee: Eren Avsarogullari
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> AQE can materialize both *ShuffleQueryStage* and *BroadcastQueryStage* on the
> cancellation. This causes unnecessary stage materialization by submitting
> Shuffle Job and Broadcast Job. Under normal circumstances, if the stage is
> already non-materialized (a.k.a *ShuffleQueryStage.shuffleFuture* or
> *{{BroadcastQueryStage.broadcastFuture}}* is not initialized yet), it should
> just be skipped without materializing it.
> Please find sample use-case:
> *1- Stage Materialization Steps:*
> When stage materialization is failed:
> {code:java}
> 1.1- ShuffleQueryStage1 - is materialized successfully,
> 1.2- ShuffleQueryStage2 - materialization is failed,
> 1.3- ShuffleQueryStage3 - Not materialized yet so
> ShuffleQueryStage3.shuffleFuture is not initialized yet{code}
> *2- Stage Cancellation Steps:*
> {code:java}
> 2.1- ShuffleQueryStage1 - is canceled due to already materialized,
> 2.2- ShuffleQueryStage2 - is earlyFailedStage so currently, it is skipped as
> default by AQE because it could not be materialized,
> 2.3- ShuffleQueryStage3 - Problem is here: This stage is not materialized yet
> but currently, it is also tried to cancel and this stage requires to be
> materialized first.{code}
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