PJ Fanning created SPARK-8494:
---------------------------------
Summary: ClassNotFoundException when running with sbt, scala
2.10.4, spray 1.3.3
Key: SPARK-8494
URL: https://issues.apache.org/jira/browse/SPARK-8494
Project: Spark
Issue Type: Bug
Components: Spark Core
Reporter: PJ Fanning
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. The issue was that if you both:
1. Reference a scala class (e.g. None) inside of a closure.
2. Run your program with 'sbt run'
It throws an exception. 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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