manuzhang commented on a change in pull request #3497: SPARK-4170 [CORE]
Closure problems when running Scala app that "extends App"
URL: https://github.com/apache/spark/pull/3497#discussion_r258523667
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File path: core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
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@@ -345,6 +345,11 @@ object SparkSubmit {
System.exit(CLASS_NOT_FOUND_EXIT_STATUS)
}
+ // SPARK-4170
+ if (classOf[scala.App].isAssignableFrom(mainClass)) {
Review comment:
Actually, Scala will compile `object Test` into two Java classes, `class
Test$ implements scala.App` and `class Test`. We specify class name `Test`
whose `main` method would invoke that of `Test$`.
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