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Posted to issues@spark.apache.org by "Hyukjin Kwon (Jira)" <ji...@apache.org> on 2019/10/08 05:42:16 UTC
[jira] [Resolved] (SPARK-12878) Dataframe fails with nested User
Defined Types
[ https://issues.apache.org/jira/browse/SPARK-12878?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hyukjin Kwon resolved SPARK-12878.
----------------------------------
Resolution: Incomplete
> Dataframe fails with nested User Defined Types
> ----------------------------------------------
>
> Key: SPARK-12878
> URL: https://issues.apache.org/jira/browse/SPARK-12878
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.6.0
> Reporter: Joao Duarte
> Priority: Major
> Labels: bulk-closed
>
> Spark 1.6.0 crashes when using nested User Defined Types in a Dataframe.
> In version 1.5.2 the code below worked just fine:
> {code}
> import org.apache.spark.{SparkConf, SparkContext}
> import org.apache.spark.sql.catalyst.InternalRow
> import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
> import org.apache.spark.sql.types._
> @SQLUserDefinedType(udt = classOf[AUDT])
> case class A(list:Seq[B])
> class AUDT extends UserDefinedType[A] {
> override def sqlType: DataType = StructType(Seq(StructField("list", ArrayType(BUDT, containsNull = false), nullable = true)))
> override def userClass: Class[A] = classOf[A]
> override def serialize(obj: Any): Any = obj match {
> case A(list) =>
> val row = new GenericMutableRow(1)
> row.update(0, new GenericArrayData(list.map(_.asInstanceOf[Any]).toArray))
> row
> }
> override def deserialize(datum: Any): A = {
> datum match {
> case row: InternalRow => new A(row.getArray(0).toArray(BUDT).toSeq)
> }
> }
> }
> object AUDT extends AUDT
> @SQLUserDefinedType(udt = classOf[BUDT])
> case class B(text:Int)
> class BUDT extends UserDefinedType[B] {
> override def sqlType: DataType = StructType(Seq(StructField("num", IntegerType, nullable = false)))
> override def userClass: Class[B] = classOf[B]
> override def serialize(obj: Any): Any = obj match {
> case B(text) =>
> val row = new GenericMutableRow(1)
> row.setInt(0, text)
> row
> }
> override def deserialize(datum: Any): B = {
> datum match { case row: InternalRow => new B(row.getInt(0)) }
> }
> }
> object BUDT extends BUDT
> object Test {
> def main(args:Array[String]) = {
> val col = Seq(new A(Seq(new B(1), new B(2))),
> new A(Seq(new B(3), new B(4))))
> val sc = new SparkContext(new SparkConf().setMaster("local[1]").setAppName("TestSpark"))
> val sqlContext = new org.apache.spark.sql.SQLContext(sc)
> import sqlContext.implicits._
> val df = sc.parallelize(1 to 2 zip col).toDF("id","b")
> df.select("b").show()
> df.collect().foreach(println)
> }
> }
> {code}
> In the new version (1.6.0) I needed to include the following import:
> `import org.apache.spark.sql.catalyst.expressions.GenericMutableRow`
> However, Spark crashes in runtime:
> {code}
> 16/01/18 14:36:22 ERROR Executor: Exception in task 0.0 in stage 0.0 (TID 0)
> java.lang.ClassCastException: scala.runtime.BoxedUnit cannot be cast to org.apache.spark.sql.catalyst.InternalRow
> at org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow$class.getStruct(rows.scala:51)
> at org.apache.spark.sql.catalyst.expressions.GenericMutableRow.getStruct(rows.scala:248)
> at org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.apply(Unknown Source)
> at org.apache.spark.sql.execution.Project$$anonfun$1$$anonfun$apply$1.apply(basicOperators.scala:51)
> at org.apache.spark.sql.execution.Project$$anonfun$1$$anonfun$apply$1.apply(basicOperators.scala:49)
> at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
> at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
> at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
> at scala.collection.Iterator$$anon$10.next(Iterator.scala:312)
> at scala.collection.Iterator$class.foreach(Iterator.scala:727)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
> at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:48)
> at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:103)
> at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:47)
> at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:273)
> at scala.collection.AbstractIterator.to(Iterator.scala:1157)
> at scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:265)
> at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1157)
> at scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:252)
> at scala.collection.AbstractIterator.toArray(Iterator.scala:1157)
> at org.apache.spark.sql.execution.SparkPlan$$anonfun$5.apply(SparkPlan.scala:212)
> at org.apache.spark.sql.execution.SparkPlan$$anonfun$5.apply(SparkPlan.scala:212)
> at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1858)
> at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1858)
> at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
> at org.apache.spark.scheduler.Task.run(Task.scala:89)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:213)
> 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)
> {code}
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