Question

以下代码会产生Exception in thread "main" java.lang.NoSuchMethodError: org.apache.spark.sql.SQLContext.implicits()Lorg/apache/spark/sql/SQLContext$implicits$

import org.apache.spark.SparkConf
import org.apache.spark.SparkContext
import org.apache.spark.SparkContext._
import org.apache.log4j.Logger
import org.apache.log4j.Level

object Small {

  def main(args: Array[String]) {
    Logger.getLogger("org.apache.spark").setLevel(Level.WARN)
    Logger.getLogger("org.eclipse.jetty.server").setLevel(Level.OFF)
    // set up environment
    val conf = new SparkConf()
      .setMaster("local[1]")
      .setAppName("Small")
      .set("spark.executor.memory", "2g")
    val sc = new SparkContext(conf)

    val sqlContext = new org.apache.spark.sql.SQLContext(sc)
    import sqlContext.implicits._
    val df = sc.parallelize(Array((1,30),(2,10),(3,20),(1,10), (2,30))).toDF("books","readers")
    df.show

项目是用SBT建立的：

name := "Small"

version := "1.0"

scalaVersion := "2.10.4"

libraryDependencies += "org.apache.spark" %% "spark-core" % "1.3.1"

libraryDependencies += "org.apache.spark" %% "spark-sql" % "1.3.1"

我使用提交脚本运行它：

#!/bin/sh
/home/test/usr/spark-1.1.0/bin/spark-submit \
--class Small \
--master local[*] \
--driver-memory 2g \
/home/test/wks/Pairs/target/scala-2.10/small_2.10-1.0.jar

有什么想法吗？

SBT编译并打包此代码。然而，当我尝试使用sbt run运行此代码时，我得到另一个例外：[error] (run-main-0) scala.reflect.internal.MissingRequirementError: class org.apache.spark.sql.catalyst.ScalaReflection in JavaMirror with java.net.URLClassLoader@210ce673 of type class java.net.URLClassLoader with classpath [file:/home/test/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.10.4.jar, ...

启动scala程序时，有没有办法让sbt run包含所有依赖项？

Answer 1

＆＃34; /home/test/usr/spark-1.1.0/bin/spark-submit" 您的编译版本是1.3.1，它与运行时版本不同。版本1.1.0的SqlContext没有定义＆＃34;对象含义＆＃34;。

Spark 1.3.1 SQL Lib：线程“main”中的异常java.lang.NoSuchMethodError：org.apache.spark.sql.SQLContext.implicits（）

1 个答案: