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scala.MatchError: List(personObject1, personObject2, personObject3) (of class scala.collection.immutable.$colon$colon)	at org.apache.spark.sql.catalyst.CatalystTypeConverters$StringConverter$.toCatalystImpl(CatalystTypeConverters.scala:295)	at org.apache.spark.sql.catalyst.CatalystTypeConverters$StringConverter$.toCatalystImpl(CatalystTypeConverters.scala:294)	at org.apache.spark.sql.catalyst.CatalystTypeConverters$CatalystTypeConverter.toCatalyst(CatalystTypeConverters.scala:102)	at org.apache.spark.sql.catalyst.CatalystTypeConverters$StructConverter.toCatalystImpl(CatalystTypeConverters.scala:260)	at org.apache.spark.sql.catalyst.CatalystTypeConverters$StructConverter.toCatalystImpl(CatalystTypeConverters.scala:250)	at org.apache.spark.sql.catalyst.CatalystTypeConverters$CatalystTypeConverter.toCatalyst(CatalystTypeConverters.scala:102)	at org.apache.spark.sql.catalyst.CatalystTypeConverters$$anonfun$createToCatalystConverter$2.apply(CatalystTypeConverters.scala:401)	at org.apache.spark.sql.SQLContext$$anonfun$7.apply(SQLContext.scala:445)	at org.apache.spark.sql.SQLContext$$anonfun$7.apply(SQLContext.scala:445)	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)	at org.apache.spark.util.collection.ExternalSorter.insertAll(ExternalSorter.scala:219)	at org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:73)	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:73)	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)	at org.apache.spark.scheduler.Task.run(Task.scala:88)	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)