Github user vanzin commented on a diff in the pull request:

    https://github.com/apache/spark/pull/14088#discussion_r70299458
  
    --- Diff: 
yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala ---
    @@ -274,6 +288,37 @@ private object YarnClusterDriverWithFailure extends 
Logging with Matchers {
       }
     }
     
    +private object YarnClusterDriverUseSparkHadoopUtilConf extends Logging 
with Matchers {
    +  def main(args: Array[String]): Unit = {
    +    if (args.length != 2) {
    +      // scalastyle:off println
    +      System.err.println(
    +        s"""
    +        |Invalid command line: ${args.mkString(" ")}
    +        |
    +        |Usage: YarnClusterDriverUseSparkHadoopUtilConf 
[propertyKey=value] [result file]
    +        """.stripMargin)
    +      // scalastyle:on println
    +      System.exit(1)
    +    }
    +
    +    val sc = new SparkContext(new SparkConf()
    +      .set("spark.extraListeners", classOf[SaveExecutorInfo].getName)
    +      .setAppName("yarn test using SparkHadoopUtil's conf"))
    +
    +    val propertyKeyValue = args(0).split("=")
    --- End diff --
    
    Seems that you could pass `key` and `value` separately instead of having to 
parse the config; and that you don't need to pass `key` with the `spark.hadoop` 
prefix here either. You might even just hardcode the values instead...


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