Github user tgravescs commented on a diff in the pull request: https://github.com/apache/spark/pull/15009#discussion_r105261723 --- Diff: core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala --- @@ -719,7 +716,24 @@ object SparkSubmit extends CommandLineUtils { printWarning("Subclasses of scala.App may not work correctly. Use a main() method instead.") } - val mainMethod = mainClass.getMethod("main", new Array[String](0).getClass) + val sparkAppMainMethodArr = mainClass.getMethods().filter(_.getName() == "sparkMain") + val isSparkApp = sparkAppMainMethodArr.length > 0 + + val childSparkConf = sysProps.filter( p => p._1.startsWith("spark.")).toMap --- End diff -- I don't think we need the .toMap here since sysProps is already a map
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