[ 
https://issues.apache.org/jira/browse/SPARK-2632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Yin Huai updated SPARK-2632:
----------------------------

    Description: 
 Master is affected by this bug. To reproduce the exception, you can start a 
local cluster (sbin/start-all.sh) then open a spark shell.

{code}
class X() { println("What!"); def y = 3 }
val x = new X
import x.y
case class Person(name: String, age: Int)
sc.textFile("examples/src/main/resources/people.txt").map(_.split(",")).map(p 
=> Person(p(0), p(1).trim.toInt)).collect
{code}
Then you will find the exception. I am attaching the stack trace below...
{code}
org.apache.spark.SparkException: Job aborted due to stage failure: Task 0.0 in 
stage 0.0 (TID 0) had a not serializable result: $iwC$$iwC$$iwC$$iwC$X
        at 
org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1045)
        at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1029)
        at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1027)
        at 
scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
        at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
        at 
org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1027)
        at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:632)
        at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:632)
        at scala.Option.foreach(Option.scala:236)
        at 
org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:632)
        at 
org.apache.spark.scheduler.DAGSchedulerEventProcessActor$$anonfun$receive$2.applyOrElse(DAGScheduler.scala:1230)
        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:498)
        at akka.actor.ActorCell.invoke(ActorCell.scala:456)
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:237)
        at akka.dispatch.Mailbox.run(Mailbox.scala:219)
        at 
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386)
        at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
        at 
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
        at 
scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
        at 
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
{code}

  was:
 To reproduce the exception, you can start a local cluster (sbin/start-all.sh) 
then open a spark shell.

{code}
class X() { println("What!"); def y = 3 }
val x = new X
import x.y
case class Person(name: String, age: Int)
sc.textFile("examples/src/main/resources/people.txt").map(_.split(",")).map(p 
=> Person(p(0), p(1).trim.toInt)).collect
{code}
Then you will find the exception. I am attaching the stack trace below...
{code}
org.apache.spark.SparkException: Job aborted due to stage failure: Task 0.0 in 
stage 0.0 (TID 0) had a not serializable result: $iwC$$iwC$$iwC$$iwC$X
        at 
org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1045)
        at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1029)
        at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1027)
        at 
scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
        at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
        at 
org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1027)
        at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:632)
        at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:632)
        at scala.Option.foreach(Option.scala:236)
        at 
org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:632)
        at 
org.apache.spark.scheduler.DAGSchedulerEventProcessActor$$anonfun$receive$2.applyOrElse(DAGScheduler.scala:1230)
        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:498)
        at akka.actor.ActorCell.invoke(ActorCell.scala:456)
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:237)
        at akka.dispatch.Mailbox.run(Mailbox.scala:219)
        at 
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386)
        at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
        at 
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
        at 
scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
        at 
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
{code}


> Importing a method of class in Spark REPL causes the REPL to pulls in 
> unnecessary stuff.
> ----------------------------------------------------------------------------------------
>
>                 Key: SPARK-2632
>                 URL: https://issues.apache.org/jira/browse/SPARK-2632
>             Project: Spark
>          Issue Type: Bug
>            Reporter: Yin Huai
>            Priority: Blocker
>
>  Master is affected by this bug. To reproduce the exception, you can start a 
> local cluster (sbin/start-all.sh) then open a spark shell.
> {code}
> class X() { println("What!"); def y = 3 }
> val x = new X
> import x.y
> case class Person(name: String, age: Int)
> sc.textFile("examples/src/main/resources/people.txt").map(_.split(",")).map(p 
> => Person(p(0), p(1).trim.toInt)).collect
> {code}
> Then you will find the exception. I am attaching the stack trace below...
> {code}
> org.apache.spark.SparkException: Job aborted due to stage failure: Task 0.0 
> in stage 0.0 (TID 0) had a not serializable result: $iwC$$iwC$$iwC$$iwC$X
>       at 
> org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1045)
>       at 
> org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1029)
>       at 
> org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1027)
>       at 
> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
>       at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
>       at 
> org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1027)
>       at 
> org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:632)
>       at 
> org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:632)
>       at scala.Option.foreach(Option.scala:236)
>       at 
> org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:632)
>       at 
> org.apache.spark.scheduler.DAGSchedulerEventProcessActor$$anonfun$receive$2.applyOrElse(DAGScheduler.scala:1230)
>       at akka.actor.ActorCell.receiveMessage(ActorCell.scala:498)
>       at akka.actor.ActorCell.invoke(ActorCell.scala:456)
>       at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:237)
>       at akka.dispatch.Mailbox.run(Mailbox.scala:219)
>       at 
> akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386)
>       at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
>       at 
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
>       at 
> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
>       at 
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> {code}



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