Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/2432#discussion_r18313707
--- Diff:
yarn/common/src/main/scala/org/apache/spark/scheduler/cluster/YarnClusterSchedulerBackend.scala
---
@@ -48,6 +48,17 @@ private[spark] class YarnClusterSchedulerBackend(
totalRegisteredExecutors.get() >= totalExpectedExecutors *
minRegisteredRatio
}
- override def applicationId(): Option[String] =
sc.getConf.getOption("spark.yarn.app.id")
+ override def applicationId() =
+ /**
+ * In YARN Cluster mode, spark.yarn.app.id is expect to be set
+ * before user application is launched.
+ * So, if spark.yarn.app.id is not set, it is something wrong.
+ */
+ sc.getConf.getOption("spark.yarn.app.id")
+ .map(strAppId => new ApplicationId(strAppId))
+ .getOrElse {
+ logError("Application ID is not set.")
+ super.applicationId
+ }
--- End diff --
indentation is weird
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