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Lost task 18.0 in stage 0.0 (TID 4, [REDACTED]): java.lang.NullPointerException
scheduler.TaskSetManager: Lost task 18.0 in stage 0.0 (TID 4, [REDACTED]): java.lang.NullPointerException	at com.databricks.spark.avro.DefaultSource$$anonfun$buildReader$1.apply(DefaultSource.scala:151)	at com.databricks.spark.avro.DefaultSource$$anonfun$buildReader$1.apply(DefaultSource.scala:143)	at org.apache.spark.sql.execution.datasources.FileFormat$$anon$1.apply(fileSourceInterfaces.scala:279)	at org.apache.spark.sql.execution.datasources.FileFormat$$anon$1.apply(fileSourceInterfaces.scala:263)	at org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:116)	at org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:91)	at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown Source)	at org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)	at org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:370)	at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)	at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)	at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)	at org.apache.spark.util.Utils$.getIteratorSize(Utils.scala:1682)	at org.apache.spark.rdd.RDD$$anonfun$count$1.apply(RDD.scala:1115)	at org.apache.spark.rdd.RDD$$anonfun$count$1.apply(RDD.scala:1115)	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1897)	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1897)	at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)	at org.apache.spark.scheduler.Task.run(Task.scala:85)	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)	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)