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Missing an output location for shuffle 0
org.apache.spark.shuffle.MetadataFetchFailedException: Missing an output location for shuffle 2	at org.apache.spark.MapOutputTracker$$anonfun$org$apache$spark$MapOutputTracker$$convertMapStatuses$2.apply(MapOutputTracker.scala:460)	at org.apache.spark.MapOutputTracker$$anonfun$org$apache$spark$MapOutputTracker$$convertMapStatuses$2.apply(MapOutputTracker.scala:456)	at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)	at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)	at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)	at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771)	at org.apache.spark.MapOutputTracker$.org$apache$spark$MapOutputTracker$$convertMapStatuses(MapOutputTracker.scala:456)	at org.apache.spark.MapOutputTracker.getMapSizesByExecutorId(MapOutputTracker.scala:183)	at org.apache.spark.shuffle.hash.HashShuffleReader.read(HashShuffleReader.scala:47)	at org.apache.spark.rdd.ShuffledRDD.compute(ShuffledRDD.scala:90)	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)	at org.apache.spark.CacheManager.getOrCompute(CacheManager.scala:69)	at org.apache.spark.rdd.RDD.iterator(RDD.scala:262)	at org.apache.spark.rdd.ZippedPartitionsRDD2.compute(ZippedPartitionsRDD.scala:99)	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:73)	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)	at org.apache.spark.scheduler.Task.run(Task.scala:88)	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:745)