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https://issues.apache.org/jira/browse/SPARK-31985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-31985:
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    Assignee:     (was: Apache Spark)

> Remove the incomplete code path on aggregation for continuous mode
> ------------------------------------------------------------------
>
>                 Key: SPARK-31985
>                 URL: https://issues.apache.org/jira/browse/SPARK-31985
>             Project: Spark
>          Issue Type: Task
>          Components: Structured Streaming
>    Affects Versions: 3.1.0
>            Reporter: Jungtaek Lim
>            Priority: Major
>
> During work I realized we left some incomplete code parts on supporting 
> aggregation for continuous mode. (shuffle & coalesce)
>  
> The work had been occurred around first half of 2018 and stopped, and no work 
> has been done for around 2 years, so I don't expect anyone is working on this.
>  
> The functionality is undocumented (as the work was only done partially) and 
> continuous mode is experimental so I don't feel risks to get rid of the part.



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