[ https://issues.apache.org/jira/browse/SPARK-21567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wenchen Fan resolved SPARK-21567. --------------------------------- Resolution: Fixed Assignee: Liang-Chi Hsieh Fix Version/s: 2.3.0 > 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: 2.1.1, 2.2.0 > Environment: verified for spark 2.1.1 and 2.2.0 in sbt build > Reporter: Tomasz Bartczak > Assignee: Liang-Chi Hsieh > Fix For: 2.3.0 > > > 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-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org