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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.apache.spark.sql.execution.ui.SQLListener.onTaskEnd()
    2. org.apache.spark
      SQLListener.onTaskEnd
      1. org.apache.spark.sql.execution.ui.SQLListener.onTaskEnd(SQLListener.scala:167)
      1 frame
    3. Spark
      AsynchronousListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply
      1. org.apache.spark.scheduler.SparkListenerBus$class.onPostEvent(SparkListenerBus.scala:42)
      2. org.apache.spark.scheduler.LiveListenerBus.onPostEvent(LiveListenerBus.scala:31)
      3. org.apache.spark.scheduler.LiveListenerBus.onPostEvent(LiveListenerBus.scala:31)
      4. org.apache.spark.util.ListenerBus$class.postToAll(ListenerBus.scala:55)
      5. org.apache.spark.util.AsynchronousListenerBus.postToAll(AsynchronousListenerBus.scala:37)
      6. org.apache.spark.util.AsynchronousListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(AsynchronousListenerBus.scala:80)
      7. org.apache.spark.util.AsynchronousListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply(AsynchronousListenerBus.scala:65)
      8. org.apache.spark.util.AsynchronousListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply(AsynchronousListenerBus.scala:65)
      8 frames
    4. Scala
      DynamicVariable.withValue
      1. scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
      1 frame
    5. Spark
      AsynchronousListenerBus$$anon$1.run
      1. org.apache.spark.util.AsynchronousListenerBus$$anon$1$$anonfun$run$1.apply$mcV$sp(AsynchronousListenerBus.scala:64)
      2. org.apache.spark.util.Utils$.tryOrStopSparkContext(Utils.scala:1181)
      3. org.apache.spark.util.AsynchronousListenerBus$$anon$1.run(AsynchronousListenerBus.scala:63)
      3 frames