[jira] [Resolved] (SPARK-1923) ClassNotFoundException when running with sbt and Scala 2.10.3

["Patrick Wendell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-1923?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Patrick Wendell resolved SPARK-1923.
------------------------------------

    Resolution: Fixed

> ClassNotFoundException when running with sbt and Scala 2.10.3
> -------------------------------------------------------------
>
>                 Key: SPARK-1923
>                 URL: https://issues.apache.org/jira/browse/SPARK-1923
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>            Reporter: Patrick Wendell
>            Assignee: Patrick Wendell
>
> I just wanted to document this for posterity. I had an issue when running a Spark 1.0 app locally with sbt. Upgrading the scalaVersion to 2.10.4 in sbt solved this issue. Somehow scala classes were not being loaded correctly inside of the executors:
> Application:
> {code}
> import org.apache.spark.SparkConf
> import org.apache.spark.SparkContext
> object Test {
>   def main(args: Array[String]): Unit = {
>     val conf = new SparkConf().setMaster("local[4]").setAppName("Test")
>     val sc = new SparkContext(conf)
>     sc.makeRDD(1 to 1000, 10).map(x => Some(x)).count
>     sc.stop()
>   }
> {code}
> Exception:
> {code}
> org.apache.spark.SparkException: Job aborted due to stage failure: Task 0.0:1 failed 1 times, most recent failure: Exception failure in TID 1 on host localhost: java.lang.ClassNotFoundException: scala.None$
>         java.net.URLClassLoader$1.run(URLClassLoader.java:366)
>         java.net.URLClassLoader$1.run(URLClassLoader.java:355)
>         java.security.AccessController.doPrivileged(Native Method)
>         java.net.URLClassLoader.findClass(URLClassLoader.java:354)
>         java.lang.ClassLoader.loadClass(ClassLoader.java:425)
>         java.lang.ClassLoader.loadClass(ClassLoader.java:358)
>         java.lang.Class.forName0(Native Method)
>         java.lang.Class.forName(Class.java:270)
>         org.apache.spark.serializer.JavaDeserializationStream$$anon$1.resolveClass(JavaSerializer.scala:60)
>         java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1612)
>         java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
> {code}



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