Exception in thread "main" java.lang.NoSuchMethodError: scala.Predef$.ArrowAssoc(Ljava/lang/Object;)Ljava/lang/Object;
	at akka.actor.setup.ActorSystemSetup$.$anonfun$apply$1(ActorSystemSetup.scala:39)
	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
	at scala.collection.
 
TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
	at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
	at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)
	at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
	at scala.
 
collection.AbstractTraversable.map(Traversable.scala:105)
	at akka.actor.setup.ActorSystemSetup$.apply(ActorSystemSetup.scala:39)
	at akka.actor.ActorSystem$.apply(ActorSystem.scala:289)
	at akka.actor.ActorSystem$.apply(ActorSystem.scala:264)
	at org.apache.spark.util.AkkaUtils$.org$apache$spark$util$AkkaUtils$$doCreateActorSystem
 
(AkkaUtils.scala:142)
	at org.apache.spark.util.AkkaUtils$$anonfun$1.apply(AkkaUtils.scala:54)
	at org.apache.spark.util.AkkaUtils$$anonfun$1.apply(AkkaUtils.scala:53)
	at org.apache.spark.util.Utils$$anonfun$startServiceOnPort$1.apply$mcVI$sp(Utils.scala:1969)
	at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:141)
	at org.apache.spark.util.Utils$.startServiceOnPort(Utils.scala:1965)
	at org.apache.spark.util.AkkaUtils$.createActorSystem(AkkaUtils.scala:56)
	at org.apache.spark.SparkEnv$.create(SparkEnv.scala:209)
	at org.apache.spark.SparkContext.<init>(SparkContext.scala:289)
	at org.apache.spark.api.java.JavaSparkContext.<init>(JavaSparkContext.scala:54)
	at com.lcc.spark.Demo.main(Demo.java:26)

原因：使用的scala版本不統一，統一版本就好了

		 <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-actor_2.10</artifactId>
            <version>2.2.4</version>
        </dependency>

[email protected] scala$ echo $SCALA_HOME
/Users/lcc/soft/scala/scala-2.10.4
[email protected] scala$