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