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https://issues.apache.org/jira/browse/SPARK-27186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-27186.
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Resolution: Won't Fix
Sounds like too trivial to fix.
> Optimize SortShuffleWriter writing process
> ------------------------------------------
>
> Key: SPARK-27186
> URL: https://issues.apache.org/jira/browse/SPARK-27186
> Project: Spark
> Issue Type: Improvement
> Components: Shuffle
> Affects Versions: 3.0.0
> Reporter: wangjiaochun
> Priority: Minor
>
> If the SortShuffleWriter.write method records is empty, it should be return
> directly and no need to keep running，refer to the process of
> BypassMergeSortShuffleWriter.write. Here are the benefits of create Instance
> ExternalSorter and tmp file.
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