Github user tgravescs commented on the pull request:

    https://github.com/apache/spark/pull/5823#issuecomment-98144960
  
    seeing the following warning while compiling:
    
    [warn] 
/home/tgraves/tgravescs_spark/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala:247:
 postfix operator hours should be enabled
    [warn] by making the implicit value scala.language.postfixOps visible.
    [warn] This can be achieved by adding the import clause 'import 
scala.language.postfixOps'
    [warn] or by setting the compiler option -language:postfixOps.
    [warn] See the Scala docs for value scala.language.postfixOps for a 
discussion
    [warn] why the feature should be explicitly enabled.
    [warn]       sparkConf.getLong("spark.yarn.token.renewal.interval", (24 
hours).toMillis)


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