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https://issues.apache.org/jira/browse/SPARK-3292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Wendell resolved SPARK-3292.
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Resolution: Won't Fix
Seems like this is a necessary feature of the current design and can be
partially worked around by filtering in user space.
> Shuffle Tasks run incessantly even though there's no inputs
> -----------------------------------------------------------
>
> Key: SPARK-3292
> URL: https://issues.apache.org/jira/browse/SPARK-3292
> Project: Spark
> Issue Type: Improvement
> Components: Streaming
> Affects Versions: 1.0.2
> Reporter: guowei
>
> such as repartition groupby join and cogroup
> for example.
> if i want the shuffle outputs save as hadoop file ,even though there is no
> inputs , many emtpy file generate too.
> it's too expensive ,
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