[jira] [Resolved] (SPARK-17042) Repl-defined classes cannot be replicated

["Reynold Xin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-17042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin resolved SPARK-17042.
---------------------------------
       Resolution: Fixed
         Assignee: Eric Liang
    Fix Version/s: 2.1.0
                   2.0.1

> Repl-defined classes cannot be replicated
> -----------------------------------------
>
>                 Key: SPARK-17042
>                 URL: https://issues.apache.org/jira/browse/SPARK-17042
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Block Manager, Spark Core
>            Reporter: Eric Liang
>            Assignee: Eric Liang
>             Fix For: 2.0.1, 2.1.0
>
>
> A simple fix is to erase the classTag when using the default serializer, since it's not needed in that case, and the classTag was failing to deserialize on the remote end.
> The proper fix is actually to use the right classloader when deserializing the classtags, but that is a much more invasive change for 2.0.
> The following test can be added to ReplSuite to reproduce the bug:
> {code}
>   test("replicating blocks of object with class defined in repl") {
>     val output = runInterpreter("local-cluster[2,1,1024]",
>       """
>         |import org.apache.spark.storage.StorageLevel._
>         |case class Foo(i: Int)
>         |val ret = sc.parallelize((1 to 100).map(Foo), 10).persist(MEMORY_ONLY_2)
>         |ret.count()
>         |sc.getExecutorStorageStatus.map(s => s.rddBlocksById(ret.id).size).sum
>       """.stripMargin)
>     assertDoesNotContain("error:", output)
>     assertDoesNotContain("Exception", output)
>     assertContains(": Int = 20", output)
>   }
> {code}



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