[jira] [Created] (SPARK-21567) Dataset with Tuple of type alias throws error

["Tomasz Bartczak (JIRA)" <ji...@apache.org>]

Tomasz Bartczak created SPARK-21567:
---------------------------------------

             Summary: Dataset with Tuple of type alias throws error
                 Key: SPARK-21567
                 URL: https://issues.apache.org/jira/browse/SPARK-21567
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.2.0, 2.1.1
         Environment: verified for spark 2.1.1 and 2.2.0 in sbt build
            Reporter: Tomasz Bartczak


returning from a map a thing that is a tuple containg another tuple - defined as a type alias - we receive an error.

minimal reproducible case:

having a structure like this:
{code}
object C {
  type TwoInt = (Int,Int)
  def tupleTypeAlias: TwoInt = (1,1)
}
{code}

when I do:
{code}
    Seq(1).toDS().map(_ => ("",C.tupleTypeAlias))
{code}


I get exception:
{code}
type T1 is not a class
scala.ScalaReflectionException: type T1 is not a class
	at scala.reflect.api.Symbols$SymbolApi$class.asClass(Symbols.scala:275)
	at scala.reflect.internal.Symbols$SymbolContextApiImpl.asClass(Symbols.scala:84)
	at org.apache.spark.sql.catalyst.ScalaReflection$.getClassFromType(ScalaReflection.scala:682)
	at org.apache.spark.sql.catalyst.ScalaReflection$.org$apache$spark$sql$catalyst$ScalaReflection$$dataTypeFor(ScalaReflection.scala:84)
	at org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$10.apply(ScalaReflection.scala:614)
	at org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$10.apply(ScalaReflection.scala:607)
	at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
	at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
	at scala.collection.immutable.List.foreach(List.scala:381)
	at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:241)
	at scala.collection.immutable.List.flatMap(List.scala:344)
	at org.apache.spark.sql.catalyst.ScalaReflection$.org$apache$spark$sql$catalyst$ScalaReflection$$serializerFor(ScalaReflection.scala:607)
	at org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$10.apply(ScalaReflection.scala:619)
	at org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$10.apply(ScalaReflection.scala:607)
	at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
	at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
	at scala.collection.immutable.List.foreach(List.scala:381)
	at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:241)
	at scala.collection.immutable.List.flatMap(List.scala:344)
	at org.apache.spark.sql.catalyst.ScalaReflection$.org$apache$spark$sql$catalyst$ScalaReflection$$serializerFor(ScalaReflection.scala:607)
	at org.apache.spark.sql.catalyst.ScalaReflection$.serializerFor(ScalaReflection.scala:438)
	at org.apache.spark.sql.catalyst.encoders.ExpressionEncoder$.apply(ExpressionEncoder.scala:71)
	at org.apache.spark.sql.Encoders$.product(Encoders.scala:275)
	at org.apache.spark.sql.LowPrioritySQLImplicits$class.newProductEncoder(SQLImplicits.scala:233)
	at org.apache.spark.sql.SQLImplicits.newProductEncoder(SQLImplicits.scala:33)
{code}

in spark 2.1.1 the last exception was 'head of an empty list'



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org