Github user felixcheung commented on the pull request:

    https://github.com/apache/spark/pull/10171#issuecomment-164685724
  
    Well, that was the first thing I tried :)
    ```
    Exception in thread "main" java.io.IOException: Cannot run program "Rscript 
--vanilla": error=2, No such file or directory
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
        at org.apache.spark.deploy.RRunner$.main(RRunner.scala:90)
    ```
    ProcessBuilder assumes that entire string is the runnable.
    One possible trick is to do a `rCommand.split(' ').toSeq` at
    
https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/RRunner.scala#L81
    
    Another trick is to set `spark.r.driver.command` to another script that 
calls `Rscript --vanilla` - I have this working.



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