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https://issues.apache.org/jira/browse/SPARK-16510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15376010#comment-15376010
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Shivaram Venkataraman commented on SPARK-16510:
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For (a) the assumption is that we will be building the JAR during the Spark 
build process using Maven. It need not be run during the R package installation 
process and can be just used as a reference mechanism for generating a JAR.  
Also since we dont expect the file to change, we can upload the JAR built as a 
part of a release to some known location ?

> Move SparkR test JAR into Spark, include its source code
> --------------------------------------------------------
>
>                 Key: SPARK-16510
>                 URL: https://issues.apache.org/jira/browse/SPARK-16510
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SparkR
>            Reporter: Shivaram Venkataraman
>
> One of the `NOTE`s in the R CMD check is that we currently include a test JAR 
> file in SparkR which is a binary only artifact. I think we can take two steps 
> to address this
> (a) I think we should include the source code for this in say core/src/test/ 
> or something like that. As far as I know the JAR file just needs to have a 
> single method. 
> (b) We should move the JAR file out of the SparkR test support and into some 
> other location in Spark. The trouble is that its tricky to run the test with 
> CRAN mode then. We could either disable the test for CRAN or download the JAR 
> from an external URL



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