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https://issues.apache.org/jira/browse/SPARK-31798?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun resolved SPARK-31798.
-----------------------------------
Fix Version/s: 3.1.0
Resolution: Fixed
Issue resolved by pull request 28616
[https://github.com/apache/spark/pull/28616]
> Return map output metadata from shuffle writers
> -----------------------------------------------
>
> Key: SPARK-31798
> URL: https://issues.apache.org/jira/browse/SPARK-31798
> Project: Spark
> Issue Type: Sub-task
> Components: Shuffle
> Affects Versions: 3.0.0
> Reporter: Matt Cheah
> Assignee: Matt Cheah
> Priority: Major
> Fix For: 3.1.0
>
>
> Part of the overall sub-push for shuffle metadata management as proposed in
> [this
> document|https://docs.google.com/document/d/1Aj6IyMsbS2sdIfHxLvIbHUNjHIWHTabfknIPoxOrTjk/edit].
> The shuffle plugin system needs a means for storing custom metadata for
> shuffle readers to eventually use. This task tracks the API changes required
> for the map output writer to return some such metadata back to the driver.
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