我对Scala和Spark还很陌生。在使用IntelliJ时,我发现很难让事情顺利运行。目前,我无法运行以下代码。我相信这只是一些简单的问题,但我无法使它正常工作。
我正在尝试运行:
import org.apache.spark.{SparkConf, SparkContext}
object TestScala {
def main(args: Array[String]): Unit = {
val conf = new SparkConf()
conf.setAppName("Datasets Test")
conf.setMaster("local[2]")
val sc = new SparkContext(conf)
println(sc)
}
}
我遇到的错误是:
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:1413)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:77)
at TestScala$.main(TestScala.scala:13)
at TestScala.main(TestScala.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)
我的build.sbt文件:
name := "sparkBook"
version := "1.0"
scalaVersion := "2.12.1"
build.sbt
文件? - Nagarjuna Pamubuild.sbt
文件中没有包含Spark依赖项。为什么? - Nagarjuna Pamu