以往都是用java运行spark的没问题，今天用scala在eclipse上运行spark的代码倒是出现了错误 ，记录

首先是当我把相关的包导入好后，Run，报错：

Exception in thread "main"org.apache.spark.SparkException: A master URL must be set in your configuration

at org.apache.spark.SparkContext.(SparkContext.scala:185)

at SparkDemo.SimpleApp$.main(SimpleApp.scala:13)

at SparkDemo.SimpleApp.main(SimpleApp.scala)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

Using Spark‘sdefault log4j profile: org/apache/spark/log4j-defaults.propertie

通过百度下找到了相似的解决，在IntelliJ解决办法：在IDE中点击Run -> Edit Configuration，在右侧VM options中输入“-Dspark.master=local”，指示本程序本地单线程运行

但是我在eclipse中运行，应该是同样的道理，在eclipse中进行配置，Run -> Run Configuration 在 Arguments 中配置 VM arguments 配置-Dspark.master=local

再次运行，依旧出错：

Exception in thread "main" java.lang.NoSuchMethodError: scala.collection.immutable.HashSet$.empty()Lscala/collection/immutable/HashSet;

at akka.actor.ActorCell$.(ActorCell.scala:336)

at akka.actor.ActorCell$.(ActorCell.scala)

at akka.actor.RootActorPath.$div(ActorPath.scala:159)

at akka.actor.LocalActorRefProvider.(ActorRefProvider.scala:464)

at akka.actor.LocalActorRefProvider.(ActorRefProvider.scala:452)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)

eclipse中Spark版本为1.2.0，运行环境scala为2.11，看来Spark版本和Scala版本还是存在一些兼容性问题，,eclipse中编译eclipse变为2.10版本问题将解决。