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https://issues.apache.org/jira/browse/SPARK-40972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17626490#comment-17626490
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Yuming Wang commented on SPARK-40972:
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cc [~michaelzhang-db]
> OptimizeLocalShuffleReader causing data skew
> --------------------------------------------
>
> Key: SPARK-40972
> URL: https://issues.apache.org/jira/browse/SPARK-40972
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Mingming Ge
> Priority: Major
> Attachments: image-2022-10-31-15-50-36-435.png,
> image-2022-10-31-15-51-39-430.png, image-2022-10-31-15-53-19-751.png,
> image-2022-10-31-15-57-41-599.png
>
>
> Because there are many empty files in the table, the partition num of
> OptimizeLocalShuffleReader to optimize partition num is 1
> !image-2022-10-31-15-53-19-751.png!
> !image-2022-10-31-15-57-41-599.png!
> !image-2022-10-31-15-50-36-435.png!
>
>
> !image-2022-10-31-15-51-39-430.png!
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