Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/1490#issuecomment-50424188
The Jenkins build failed because your code failed the automated Scala style
checks (see the [Spark Code Style
Guide](https://cwiki.apache.org/confluence/display/SPARK/Spark+Code+Style+Guide)).
You can run `sbt/sbt scalastyle` to run these checks locally.
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