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java.lang.ArrayIndexOutOfBoundsException: 3	at $line14.$read$$iwC$$iwC$$iwC$$iwC$$anonfun$2.apply(:21)	at $line14.$read$$iwC$$iwC$$iwC$$iwC$$anonfun$2.apply(:21)	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)	at scala.collection.Iterator$$anon$1.next(Iterator.scala:853)	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)	at scala.collection.Iterator$class.foreach(Iterator.scala:727)	at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:158)	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:99)	at org.apache.spark.scheduler.Task.run(Task.scala:51)	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:187)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:745)