[
https://issues.apache.org/jira/browse/SPARK-12878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15160119#comment-15160119
]
Jakob Odersky edited comment on SPARK-12878 at 2/24/16 7:16 PM:
----------------------------------------------------------------
I just tried your example and get a slightly different exception:
{{java.lang.ClassCastException: B cannot be cast to
org.apache.spark.sql.catalyst.InternalRow}} (B as opposed to BoxedUnit)
However I actually don't understand why this worked in 1.5.2 in the first
place. Consider the following extract from your snippet:
{code}
case A(list) =>
val row = new GenericMutableRow(1)
row.update(0, new GenericArrayData(list.map(_.asInstanceOf[Any]).toArray))
row
{code}
although `list` is a collection of elements B in this case, I don't think that
the individual Bs are serialized according to the definition in BUDT.
I would assume you are solely responsible for the serialization and would have
to call something like {{list.map(BUDT.serialize(_))}} to convert any child
elements to an "SQL Datum" (not sure what that is but the docs say it,
http://spark.apache.org/docs/latest/api/scala/index.html#org.apache.spark.sql.types.UserDefinedType)
Maybe someone with more knowledge on the topic can clarify what's going on?
was (Author: jodersky):
I just tried your example and get a slightly different exception:
{{java.lang.ClassCastException: B cannot be cast to
org.apache.spark.sql.catalyst.InternalRow}} (B as opposed to BoxedUnit)
However I actually don't understand why this worked in 1.5.2 in the first
place. Consider the following extract from your snippet:
{code}
case A(list) =>
val row = new GenericMutableRow(1)
row.update(0, new GenericArrayData(list.map(_.asInstanceOf[Any]).toArray))
row
{code}
although `list` is a collection of elements B in this case, I don't think that
the individual B's are serialized according to the definition in BUDT.
I would assume you are solely responsible for the serialization and would have
to call something like {{list.map(BUDT.serialize(_))}} to convert any child
elements to an "SQL Datum" (not sure what that is but the docs say it,
http://spark.apache.org/docs/latest/api/scala/index.html#org.apache.spark.sql.types.UserDefinedType)
Maybe someone with more knowledge on the topic can clarify what's going on?
> 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
> Priority: Blocker
>
> 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:
> 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)
> }
> }
> 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:
> 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)
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
