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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-12783) Dataset map serialization error
Date Sat, 16 Jan 2016 01:01:49 GMT

     [ https://issues.apache.org/jira/browse/SPARK-12783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Apache Spark reassigned SPARK-12783:
------------------------------------

    Assignee: Apache Spark  (was: Wenchen Fan)

> Dataset map serialization error
> -------------------------------
>
>                 Key: SPARK-12783
>                 URL: https://issues.apache.org/jira/browse/SPARK-12783
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.6.0
>            Reporter: Muthu Jayakumar
>            Assignee: Apache Spark
>            Priority: Critical
>
> When Dataset API is used to map to another case class, an error is thrown.
> {code}
> case class MyMap(map: Map[String, String])
> case class TestCaseClass(a: String, b: String){
>   def toMyMap: MyMap = {
>     MyMap(Map(a->b))
>   }
>   def toStr: String = {
>     a
>   }
> }
> //Main method section below
> import sqlContext.implicits._
> val df1 = sqlContext.createDataset(Seq(TestCaseClass("2015-05-01", "data1"), TestCaseClass("2015-05-01",
"data2"))).toDF()
> df1.as[TestCaseClass].map(_.toStr).show() //works fine
> df1.as[TestCaseClass].map(_.toMyMap).show() //fails
> {code}
> Error message:
> {quote}
> Caused by: java.io.NotSerializableException: scala.reflect.runtime.SynchronizedSymbols$SynchronizedSymbol$$anon$1
> Serialization stack:
> 	- object not serializable (class: scala.reflect.runtime.SynchronizedSymbols$SynchronizedSymbol$$anon$1,
value: package lang)
> 	- field (class: scala.reflect.internal.Types$ThisType, name: sym, type: class scala.reflect.internal.Symbols$Symbol)
> 	- object (class scala.reflect.internal.Types$UniqueThisType, java.lang.type)
> 	- field (class: scala.reflect.internal.Types$TypeRef, name: pre, type: class scala.reflect.internal.Types$Type)
> 	- object (class scala.reflect.internal.Types$ClassNoArgsTypeRef, String)
> 	- field (class: scala.reflect.internal.Types$TypeRef, name: normalized, type: class
scala.reflect.internal.Types$Type)
> 	- object (class scala.reflect.internal.Types$AliasNoArgsTypeRef, String)
> 	- field (class: org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$6, name: keyType$1,
type: class scala.reflect.api.Types$TypeApi)
> 	- object (class org.apache.spark.sql.catalyst.ScalaReflection$$anonfun$6, <function1>)
> 	- field (class: org.apache.spark.sql.catalyst.expressions.MapObjects, name: function,
type: interface scala.Function1)
> 	- object (class org.apache.spark.sql.catalyst.expressions.MapObjects, mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),keyArray,ArrayType(StringType,true)),StringType))
> 	- field (class: org.apache.spark.sql.catalyst.expressions.Invoke, name: targetObject,
type: class org.apache.spark.sql.catalyst.expressions.Expression)
> 	- object (class org.apache.spark.sql.catalyst.expressions.Invoke, invoke(mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),keyArray,ArrayType(StringType,true)),StringType),array,ObjectType(class
[Ljava.lang.Object;)))
> 	- writeObject data (class: scala.collection.immutable.List$SerializationProxy)
> 	- object (class scala.collection.immutable.List$SerializationProxy, scala.collection.immutable.List$SerializationProxy@4c7e3aab)
> 	- writeReplace data (class: scala.collection.immutable.List$SerializationProxy)
> 	- object (class scala.collection.immutable.$colon$colon, List(invoke(mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),keyArray,ArrayType(StringType,true)),StringType),array,ObjectType(class
[Ljava.lang.Object;)), invoke(mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),valueArray,ArrayType(StringType,true)),StringType),array,ObjectType(class
[Ljava.lang.Object;))))
> 	- field (class: org.apache.spark.sql.catalyst.expressions.StaticInvoke, name: arguments,
type: interface scala.collection.Seq)
> 	- object (class org.apache.spark.sql.catalyst.expressions.StaticInvoke, staticinvoke(class
org.apache.spark.sql.catalyst.util.ArrayBasedMapData$,ObjectType(interface scala.collection.Map),toScalaMap,invoke(mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),keyArray,ArrayType(StringType,true)),StringType),array,ObjectType(class
[Ljava.lang.Object;)),invoke(mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),valueArray,ArrayType(StringType,true)),StringType),array,ObjectType(class
[Ljava.lang.Object;)),true))
> 	- writeObject data (class: scala.collection.immutable.List$SerializationProxy)
> 	- object (class scala.collection.immutable.List$SerializationProxy, scala.collection.immutable.List$SerializationProxy@78d9820)
> 	- writeReplace data (class: scala.collection.immutable.List$SerializationProxy)
> 	- object (class scala.collection.immutable.$colon$colon, List(staticinvoke(class org.apache.spark.sql.catalyst.util.ArrayBasedMapData$,ObjectType(interface
scala.collection.Map),toScalaMap,invoke(mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),keyArray,ArrayType(StringType,true)),StringType),array,ObjectType(class
[Ljava.lang.Object;)),invoke(mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),valueArray,ArrayType(StringType,true)),StringType),array,ObjectType(class
[Ljava.lang.Object;)),true)))
> 	- field (class: org.apache.spark.sql.catalyst.expressions.NewInstance, name: arguments,
type: interface scala.collection.Seq)
> 	- object (class org.apache.spark.sql.catalyst.expressions.NewInstance, newinstance(class
collector.MyMap,staticinvoke(class org.apache.spark.sql.catalyst.util.ArrayBasedMapData$,ObjectType(interface
scala.collection.Map),toScalaMap,invoke(mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),keyArray,ArrayType(StringType,true)),StringType),array,ObjectType(class
[Ljava.lang.Object;)),invoke(mapobjects(<function1>,invoke(upcast('map,MapType(StringType,StringType,true),-
field (class: "scala.collection.immutable.Map", name: "map"),- root class: "collector.MyMap"),valueArray,ArrayType(StringType,true)),StringType),array,ObjectType(class
[Ljava.lang.Object;)),true),false,ObjectType(class collector.MyMap),None))
> 	- field (class: org.apache.spark.sql.catalyst.encoders.ExpressionEncoder, name: fromRowExpression,
type: class org.apache.spark.sql.catalyst.expressions.Expression)
> 	- object (class org.apache.spark.sql.catalyst.encoders.ExpressionEncoder, class[map#ExprId(9,5d198984-4022-43b2-a2a3-ddbb214ba0ef):
map<string,string>])
> 	- field (class: org.apache.spark.sql.execution.MapPartitions, name: uEncoder, type:
class org.apache.spark.sql.catalyst.encoders.ExpressionEncoder)
> 	- object (class org.apache.spark.sql.execution.MapPartitions, !MapPartitions <function1>,
class[a[0]: string, b[0]: string], class[map#ExprId(9,5d198984-4022-43b2-a2a3-ddbb214ba0ef):
map<string,string>], [map#13]
> +- LocalTableScan [a#2,b#3], [[0,180000000a,2800000005,2d35302d35313032,3130,3161746164],[0,180000000a,2800000005,2d35302d35313032,3130,3261746164]]
> )
> 	- field (class: org.apache.spark.sql.execution.MapPartitions$$anonfun$8, name: $outer,
type: class org.apache.spark.sql.execution.MapPartitions)
> 	- object (class org.apache.spark.sql.execution.MapPartitions$$anonfun$8, <function1>)
> 	- field (class: org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1, name: f$22,
type: interface scala.Function1)
> 	- object (class org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1, <function0>)
> 	- field (class: org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$21,
name: $outer, type: class org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1)
> 	- object (class org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$21,
<function3>)
> 	- field (class: org.apache.spark.rdd.MapPartitionsRDD, name: f, type: interface scala.Function3)
> 	- object (class org.apache.spark.rdd.MapPartitionsRDD, MapPartitionsRDD[1] at show at
CollectorSparkTest.scala:50)
> 	- field (class: org.apache.spark.NarrowDependency, name: _rdd, type: class org.apache.spark.rdd.RDD)
> 	- object (class org.apache.spark.OneToOneDependency, org.apache.spark.OneToOneDependency@4d60c27d)
> 	- writeObject data (class: scala.collection.immutable.List$SerializationProxy)
> 	- object (class scala.collection.immutable.List$SerializationProxy, scala.collection.immutable.List$SerializationProxy@6c436651)
> 	- writeReplace data (class: scala.collection.immutable.List$SerializationProxy)
> 	- object (class scala.collection.immutable.$colon$colon, List(org.apache.spark.OneToOneDependency@4d60c27d))
> 	- field (class: org.apache.spark.rdd.RDD, name: org$apache$spark$rdd$RDD$$dependencies_,
type: interface scala.collection.Seq)
> 	- object (class org.apache.spark.rdd.MapPartitionsRDD, MapPartitionsRDD[2] at show at
CollectorSparkTest.scala:50)
> 	- field (class: scala.Tuple2, name: _1, type: class java.lang.Object)
> 	- object (class scala.Tuple2, (MapPartitionsRDD[2] at show at CollectorSparkTest.scala:50,<function2>))
> 	at org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:40)
> 	at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:47)
> 	at org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:101)
> 	at org.apache.spark.scheduler.DAGScheduler.submitMissingTasks(DAGScheduler.scala:1003)
> 	at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$submitStage(DAGScheduler.scala:921)
> 	at org.apache.spark.scheduler.DAGScheduler.handleJobSubmitted(DAGScheduler.scala:861)
> 	at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1607)
> 	at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1599)
> 	at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1588)
> 	at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
> {quote}



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