fixes SPARK-4298

Author: Brennon York

core/src/main/scala/org/apache/spark/deploy/SparkSubmitArguments.scala

@@ -17,6 +17,7 @@
 
 package org.apache.spark.deploy
 
+import java.net.URI
 import java.util.jar.JarFile
 
 import scala.collection.mutable.{ArrayBuffer, HashMap}
@@ -124,12 +125,13 @@ private[spark] class SparkSubmitArguments(args: Seq[String], env: Map[String, St
     // Try to set main class from JAR if no --class argument is given
     if (mainClass == null && !isPython && primaryResource != null) {
       try {
-        val jar = new JarFile(primaryResource)
+        val jar = new JarFile(new URI(primaryResource).getPath)
         // Note that this might still return null if no main-class is set; we catch that later
         mainClass = jar.getManifest.getMainAttributes.getValue("Main-Class")
       } catch {
         case e: Exception =>
-          SparkSubmit.printErrorAndExit("Cannot load main class from JAR: " + primaryResource)
+          SparkSubmit.printErrorAndExit("Cannot main: " + primaryResource)
+          //SparkSubmit.printErrorAndExit("Cannot load main class from JAR: " + primaryResource)
           return
       }
     }