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https://issues.apache.org/jira/browse/SPARK-22554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-22554.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 2.3.0

Issue resolved by pull request 19782
[https://github.com/apache/spark/pull/19782]

> Add a config to control if PySpark should use daemon or not
> -----------------------------------------------------------
>
>                 Key: SPARK-22554
>                 URL: https://issues.apache.org/jira/browse/SPARK-22554
>             Project: Spark
>          Issue Type: Improvement
>          Components: PySpark
>    Affects Versions: 2.3.0
>            Reporter: Hyukjin Kwon
>            Priority: Trivial
>             Fix For: 2.3.0
>
>
> Actually, SparkR already has a flag for {{useDaemon}}:
> https://github.com/apache/spark/blob/478fbc866fbfdb4439788583281863ecea14e8af/core/src/main/scala/org/apache/spark/api/r/RRunner.scala#L362
> It'd be great if we have this flag too. It makes easier to test Windows 
> specific issue.
> Also, this is also partly for running Python coverage without extra code 
> change. I know a hacky way to run this:
> https://github.com/apache/spark/pull/19630#issuecomment-345490662



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