Class loading issue when using Spark SQL Java API

ClassNotFoundException in Executor when running JavaSparkSQL example using spark-submit in local mode.

14/04/22 12:26:20 ERROR Executor: Exception in task ID 0
java.lang.ClassNotFoundException: org.apache.spark.examples.sql.JavaSparkSQL.Person
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at org.apache.spark.sql.api.java.JavaSQLContext$$anonfun$1.apply(JavaSQLContext.scala:90)
at org.apache.spark.sql.api.java.JavaSQLContext$$anonfun$1.apply(JavaSQLContext.scala:88)
at org.apache.spark.rdd.RDD$$anonfun$3.apply(RDD.scala:512)
at org.apache.spark.rdd.RDD$$anonfun$3.apply(RDD.scala:512)
at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)