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https://issues.apache.org/jira/browse/SPARK-15799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15318769#comment-15318769
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Shivaram Venkataraman commented on SPARK-15799:
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I dont think there are any license issues and at least before we merged SparkR 
into the apache the package passed all the CRAN checks. The only problem is 
that we might need to ship the entire Spark assembly JAR (or all the jars that 
we have with the new release structure) to make the package work without 
additional downloads. Some other minor things that might make it challenging to 
use SparkR directly from CRAN
1. Matching versions between client and cluster versions of Spark. This is 
still a requirement today but the main difference is that people might upgrade 
CRAN packages separately from their Spark clusters say.
2. Figuring out where to put scripts like spark-submit that can be used to 
submit batch jobs. This isn't something normal R packages offer so I'm not sure 
there are existing practices we can follow here.

> Release SparkR on CRAN
> ----------------------
>
>                 Key: SPARK-15799
>                 URL: https://issues.apache.org/jira/browse/SPARK-15799
>             Project: Spark
>          Issue Type: New Feature
>          Components: SparkR
>            Reporter: Xiangrui Meng
>
> Story: "As an R user, I would like to see SparkR released on CRAN, so I can 
> use SparkR easily in an existing R environment and have other packages built 
> on top of SparkR."
> I made this JIRA with the following questions in mind:
> * Are there known issues that prevent us releasing SparkR on CRAN?
> * Do we want to package Spark jars in the SparkR release?
> * Are there license issues?
> * How does it fit into Spark's release process?



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