i confirmed that an Encoder[Array[Int]] is no longer serializable, and with my spark build from march 7 it was.
i believe the issue is commit 295747e59739ee8a697ac3eba485d3439e4a04c3 and i send wenchen an email about it. On Wed, Apr 12, 2017 at 4:31 PM, Koert Kuipers <ko...@tresata.com> wrote: > i believe the error is related to an > org.apache.spark.sql.expressions.Aggregator > where the buffer type (BUF) is Array[Int] > > On Wed, Apr 12, 2017 at 4:19 PM, Koert Kuipers <ko...@tresata.com> wrote: > >> hey all, >> today i tried upgrading the spark version we use internally by creating a >> new internal release from the spark master branch. last time i did this was >> march 7. >> >> with this updated spark i am seeing some serialization errors in the unit >> tests for our own libraries. looks like a scala reflection type that is not >> serializable is getting sucked into serialization for the encoder? >> see below. >> best, >> koert >> >> [info] org.apache.spark.SparkException: Task not serializable >> [info] at org.apache.spark.util.ClosureCleaner$.ensureSerializable(Clo >> sureCleaner.scala:298) >> [info] at org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ >> ClosureCleaner$$clean(ClosureCleaner.scala:288) >> [info] at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner. >> scala:108) >> [info] at org.apache.spark.SparkContext.clean(SparkContext.scala:2284) >> [info] at org.apache.spark.SparkContext.runJob(SparkContext.scala:2058) >> ... >> [info] Serialization stack: >> [info] - object not serializable (class: >> scala.reflect.internal.BaseTypeSeqs$BaseTypeSeq, value: >> BTS(Int,AnyVal,Any)) >> [info] - field (class: scala.reflect.internal.Types$TypeRef, name: >> baseTypeSeqCache, type: class scala.reflect.internal.BaseTyp >> eSeqs$BaseTypeSeq) >> [info] - object (class scala.reflect.internal.Types$ClassNoArgsTypeRef, >> Int) >> [info] - field (class: >> org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$6, >> name: elementType$2, type: class scala.reflect.api.Types$TypeApi) >> [info] - object (class >> org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$6, >> <function1>) >> [info] - field (class: org.apache.spark.sql.catalyst. >> expressions.objects.UnresolvedMapObjects, name: function, type: >> interface scala.Function1) >> [info] - object (class org.apache.spark.sql.catalyst. >> expressions.objects.UnresolvedMapObjects, unresolvedmapobjects(<function1>, >> getcolumnbyordinal(0, ArrayType(IntegerType,false)), Some(interface >> scala.collection.Seq))) >> [info] - field (class: org.apache.spark.sql.catalyst. >> expressions.objects.WrapOption, name: child, type: class >> org.apache.spark.sql.catalyst.expressions.Expression) >> [info] - object (class org.apache.spark.sql.catalyst. >> expressions.objects.WrapOption, wrapoption(unresolvedmapobjects(<function1>, >> getcolumnbyordinal(0, ArrayType(IntegerType,false)), Some(interface >> scala.collection.Seq)), ObjectType(interface scala.collection.Seq))) >> [info] - writeObject data (class: scala.collection.immutable.Lis >> t$SerializationProxy) >> [info] - object (class >> scala.collection.immutable.List$SerializationProxy, >> scala.collection.immutable.List$SerializationProxy@69040c85) >> [info] - writeReplace data (class: scala.collection.immutable.Lis >> t$SerializationProxy) >> [info] - object (class scala.collection.immutable.$colon$colon, >> List(wrapoption(unresolvedmapobjects(<function1>, getcolumnbyordinal(0, >> ArrayType(IntegerType,false)), Some(interface scala.collection.Seq)), >> ObjectType(interface scala.collection.Seq)))) >> [info] - field (class: org.apache.spark.sql.catalyst. >> expressions.objects.NewInstance, name: arguments, type: interface >> scala.collection.Seq) >> [info] - object (class org.apache.spark.sql.catalyst. >> expressions.objects.NewInstance, newInstance(class scala.Tuple1)) >> [info] - field (class: >> org.apache.spark.sql.catalyst.encoders.ExpressionEncoder, >> name: deserializer, type: class org.apache.spark.sql.catalyst. >> expressions.Expression) >> [info] - object (class >> org.apache.spark.sql.catalyst.encoders.ExpressionEncoder, >> class[_1[0]: array<int>]) >> ... >> >> >
