java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at scala.collection.mutable.ArrayOps$ofRef.length(ArrayOps.scala:115)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at org.apache.spark.deploy.yarn.Client$.populateHadoopClasspath(Client.scala:489)
at org.apache.spark.deploy.yarn.Client$.populateClasspath(Client.scala:510)
at org.apache.spark.deploy.yarn.Client.setupLaunchEnv(Client.scala:327)
at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.start(YarnClientSchedulerBackend.scala:71)
at org.apache.spark.scheduler.cluster.ClusterScheduler.start(ClusterScheduler.scala:119)
at org.apache.spark.SparkContext.init(SparkContext.scala:273)

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