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https://issues.apache.org/jira/browse/SPARK-29954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan updated SPARK-29954:
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Parent Issue: SPARK-31412 (was: SPARK-29544)
> collect the runtime statistics of row count in map stage
> --------------------------------------------------------
>
> Key: SPARK-29954
> URL: https://issues.apache.org/jira/browse/SPARK-29954
> Project: Spark
> Issue Type: Sub-task
> Components: Shuffle
> Affects Versions: 3.0.0
> Reporter: Ke Jia
> Priority: Major
>
> We need the row count info to more accurately estimate the data skew
> situation when too many duplicated data. This PR will collect the row count
> info in map stage.
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