运行火花scala示例失败

我是Spark和Scala的新手。我已经用SBT创建了一个IntelliJ Scala项目，并添加了几行build.sbt。

name := "test-one"

version := "1.0"

scalaVersion := "2.11.2"

libraryDependencies += "org.apache.spark" % "spark-core_2.10" % "1.1.0"

我的Scala版本是2.10.4，但这个问题也发生在2.11.2

Exception in thread "main" java.lang.NoClassDefFoundError: scala/collection/GenTraversableOnce$class
    at akka.util.Collections$EmptyImmutableSeq$.<init>(Collections.scala:15)
    at akka.util.Collections$EmptyImmutableSeq$.<clinit>(Collections.scala)
    at akka.japi.Util$.immutableSeq(JavaAPI.scala:209)
    at akka.actor.ActorSystem$Settings.<init>(ActorSystem.scala:150)
    at akka.actor.ActorSystemImpl.<init>(ActorSystem.scala:470)
    at akka.actor.ActorSystem$.apply(ActorSystem.scala:111)
    at akka.actor.ActorSystem$.apply(ActorSystem.scala:104)
    at org.apache.spark.util.AkkaUtils$.org$apache$spark$util$AkkaUtils$$doCreateActorSystem(AkkaUtils.scala:121)
    at org.apache.spark.util.AkkaUtils$$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$sp(Utils.scala:1446)
    at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:160)
    at org.apache.spark.util.Utils$.startServiceOnPort(Utils.scala:1442)
    at org.apache.spark.util.AkkaUtils$.createActorSystem(AkkaUtils.scala:56)
    at org.apache.spark.SparkEnv$.create(SparkEnv.scala:153)
    at org.apache.spark.SparkContext.<init>(SparkContext.scala:203)
    at TweeProcessor$.main(TweeProcessor.scala:10)
    at TweeProcessor.main(TweeProcessor.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: java.lang.classNotFoundException: scala.collection.GenTraversableOnce$class
    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)
    ... 23 more

尝试在线查找，大多数答案指向API版本和Scala版本之间的不匹配，但没有一个特定于Spark。

解决方法

spark-core_2.10是用于2.10.x版本的scala的。你应该使用

libraryDependencies += "org.apache.spark" %% "spark-core" % "1.1.0"

这将为您的scala版本选择正确的_2.10或_2.11版本。

还要确保您正在编译与您运行此操作的群集上相同版本的scala和spark。