spark例子SimpleApp运行错误

在运行spark文档quick start里面的一个例子的时候，出现了如下错误：

Exception in thread "main" java.lang.NoSuchMethodError: scala.Predef$.refArrayOps([Ljava/lang/Object;)Lscala/collection/mutable/ArrayOps;
    at org.apache.spark.util.Utils$.getCallSite(Utils.scala:1410)
    at org.apache.spark.SparkContext.<init>(SparkContext.scala:77)
    at SimpleApp$.main(SimpleApp.scala:12)
    at SimpleApp.main(SimpleApp.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

Process finished with exit code 1

因为没有按照文档里面的Scala版本号下载对应的Scala，下载对应的版本2.11.7

改过

val conf = new SparkConf().setAppName("Simple Application").setMaster("local[*]")