在执行spark wordcount程序时遇到以下错误，请对此进行点灯
火花版本：2.4.0以独立模式运行
打包com.ahshan.sparklearning
import org.apache.spark._
import org.apache.spark.SparkConf
import org.apache.spark.SparkContext
import org.apache.spark.SparkContext._
object WordCount {
def main(args: Array[String]) {
val conf = new SparkConf().setAppName("wordCount")
val sc = new SparkContext(conf)
// Load our input data.
val input = sc.textFile("file:///tmp/README.md")
// Split it up into words.
val words = input.flatMap(line => line.split(" "))
// Transform into pairs and count.
val counts = words.map(word => (word, 1)).reduceByKey{case (x, y) => x + y}
// Save the word count back out to a text file, causing evaluation.
counts.saveAsTextFile("file:///tmp/sparkout.txt")
}
}
sbt clean package
[info] Loading project definition from /root/SparkProject/project
[info] Loading settings for project sparkproject from build.sbt ...
[info] Set current project to learning-spark (in build file:/root/SparkProject/)
[success] Total time: 0 s, completed Feb 4, 2019 7:05:37 AM
[info] Updating ...
[info] Done updating.
[warn] There may be incompatibilities among your library dependencies; run 'evicted' to see detailed eviction warnings.
[info] Compiling 1 Scala source to /root/SparkProject/target/scala-2.12/classes ...
[info] Done compiling.
[info] Packaging /root/SparkProject/target/scala-2.12/learning-spark_2.12-0.0.1.jar ...
[info] Done packaging.
[success] Total time: 8 s, completed Feb 4, 2019 7:05:45 AM
2019-02-04 07:02:54 INFO BlockManagerInfo：54-添加 内存中的广播_0_piece0 sparkserver：39679（大小：22.9 KB，免费：366.3 MB）2019-02-04 07:02:54 INFO SparkContext：54-创建的广播0 从WordCount.scala上的textFile：14线程“ main”中的异常 java.lang.BootstrapMethodError：java.lang.NoClassDefFoundError： scala / runtime / java8 / JFunction2 $ mcIII $ sp在 com.ahshan.sparklearning.WordCount $ .main（WordCount.scala：18）在 com.ahshan.sparklearning.WordCount.main（WordCount.scala）位于 sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）位于 sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62） 在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） 在java.lang.reflect.Method.invoke（Method.java:498）在 org.apache.spark.deploy.JavaMainApplication.start（SparkApplication.scala：52） 在 org.apache.spark.deploy.SparkSubmit.org $ apache $ spark $ deploy $ SparkSubmit $$ runMain（SparkSubmit.scala：849） 在 org.apache.spark.deploy.SparkSubmit.doRunMain $ 1（SparkSubmit.scala：167） 在org.apache.spark.deploy.SparkSubmit.submit（SparkSubmit.scala：195） 在org.apache.spark.deploy.SparkSubmit.doSubmit（SparkSubmit.scala：86） 在 org.apache.spark.deploy.SparkSubmit $$ anon $ 2.doSubmit（SparkSubmit.scala：924） 在org.apache.spark.deploy.SparkSubmit $ .main（SparkSubmit.scala：933） 在org.apache.spark.deploy.SparkSubmit.main（SparkSubmit.scala）上引起 创建人：java.lang.NoClassDefFoundError： scala / runtime / java8 / JFunction2 $ mcIII $ sp ... 14更多原因： java.lang.ClassNotFoundException： scala.runtime.java8.JFunction2 $ mcIII $ sp在 java.net.URLClassLoader.findClass（URLClassLoader.java:381）在 java.lang.ClassLoader.loadClass（ClassLoader.java:424）在 java.lang.ClassLoader.loadClass（ClassLoader.java:357）...还有14个