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https://issues.apache.org/jira/browse/SPARK-8487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15001737#comment-15001737
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Chris Howard commented on SPARK-8487:
-------------------------------------

Hi [~tdas] - can you clarify this doc change? 

The def for reduceByKeyAndWindow shows filterFunc as optional - not sure how 
this relates to your comment "highlight that filtering Function must be used".

The documentation is missing the overloaded version of reduceByKeyAndWindow 
that allows for a filtering function to be specified.




> Update reduceByKeyAndWindow docs to highlight that filtering Function must be 
> used
> ----------------------------------------------------------------------------------
>
>                 Key: SPARK-8487
>                 URL: https://issues.apache.org/jira/browse/SPARK-8487
>             Project: Spark
>          Issue Type: Improvement
>          Components: Documentation
>            Reporter: Tathagata Das
>            Assignee: Tathagata Das
>            Priority: Critical
>




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