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https://issues.apache.org/jira/browse/SPARK-32920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17383669#comment-17383669
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Apache Spark commented on SPARK-32920:
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User 'venkata91' has created a pull request for this issue:
https://github.com/apache/spark/pull/33426
> Add support in Spark driver to coordinate the finalization of the push/merge
> phase in push-based shuffle for a given shuffle and the initiation of the
> reduce stage
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-32920
> URL: https://issues.apache.org/jira/browse/SPARK-32920
> Project: Spark
> Issue Type: Sub-task
> Components: Shuffle, Spark Core
> Affects Versions: 3.1.0
> Reporter: Min Shen
> Assignee: Venkata krishnan Sowrirajan
> Priority: Major
> Fix For: 3.2.0
>
>
> With push-based shuffle, we are currently decoupling map task executions from
> the shuffle block push process. Thus, when all map tasks finish, we might
> want to wait for some small extra time to allow more shuffle blocks to get
> pushed and merged. This requires some extra coordination in the Spark driver
> when it transitions from a shuffle map stage to the corresponding reduce
> stage.
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