Spark wordcount 编译错误 -- reduceByKey is not a member of RDD
Attempting to run http://spark.apache.org/docs/latest/quick-start.html#a-standalone-app-in-scala from source.
This line val wordCounts = textFile.flatMap(line => line.split(" ")).map(word => (word, 1)).reduceByKey(_+_) reports compile
value reduceByKey is not a member of org.apache.spark.rdd.RDD[(String, Int)]
Resolution:
import the implicit conversions from SparkContext:
import org.apache.spark.SparkContext._
They use the 'pimp up my library' pattern to add methods to RDD's of specific types. If curious, seeSparkContext:1296
Spark wordcount 编译错误 -- reduceByKey is not a member of RDD的更多相关文章
- spark wordcount程序
spark wordcount程序 IllegalAccessError错误 这个错误是权限错误,错误的引用方法,比如方法中调用private,protect方法. 当然大家知道wordcount业务 ...
- Spark程序编译报错error: object apache is not a member of package org
Spark程序编译报错: [INFO] Compiling 2 source files to E:\Develop\IDEAWorkspace\spark\target\classes at 156 ...
- Spark Wordcount
1.Wordcount.scala(本地模式) package com.Mars.spark import org.apache.spark.{SparkConf, SparkContext} /** ...
- Spark WordCount的两种方式
Spark WordCount的两种方式. 语言:Java 工具:Idea 项目:Java Maven pom.xml如下: <properties> <spark.version& ...
- Scala Spark WordCount
Scala所需依赖 <dependency> <groupId>org.scala-lang</groupId> <artifactId>scala-l ...
- xamarin.forms新建项目android编译错误
vs2015 update3 新建的xamarin.forms项目中的android项目编译错误.提示缺少android_m2repository_r22.zip,96659D653BDE0FAEDB ...
- 《转载》使用org.w3c.dom.Element的setTextContent()、getTextContent()方法时出现编译错误
今天在更新项目后进行编译时,出现如下错误一堆: 编译错误 Google之,在stackoverflow上看到如下的解决方法: I came here with the same problem. Ev ...
- asp.net教程:编译错误同时存在于不同dll中
asp.net 编译错误类型“同时存在于”不同的dll中. 出现这种错误大概有三种情况: 1.ASPX页面,一个*.ASPX,对应着一个*.cs文件,两者其实是一个文件,通过两者实现代码分离,每个*. ...
- VS2010出现FileTracker : error FTK1011编译错误的解决办法
VS2010出现FileTracker : error FTK1011不知道是不是vs2010的一个bug,反正有人提交了. FileTracker : error FTK1011编译错误的解决办法有 ...
随机推荐
- 转载:看c++ primer 学习心得
学习C++ Primer时遇到的问题及解释 chenm91 感觉: l 啰嗦有时会掩盖主题:这本书确实有些啰嗦,比如在讲函数重载的时候,讲了太长一大段(有两节是打了*号的,看还是不看 ...
- 【LeetCode 99】Recover Binary Search Tree
Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing ...
- 【剑指offer 面试题12】打印1到最大的n位数
思路: 用n位字符数组表示n位数,通过递归的方式逐层(位)遍历,递归终止时打印. #include "stdio.h" #include "string.h" ...
- [BILL WEI] A potentially dangerous Request.Path value was detected from the client 异常处理办法
我们在ASP.net中使用URL导向后, 我们在访问某个地址,或者打开某个系统页面的时候,就会报错误: A potentially dangerous Request.Path value was d ...
- EF6 Database First (DbContext) - Change Schema at runtime
Problem:There are two SQL databases (dev and live) with on Azure which has identical table structure ...
- Python xlsx 读取
代码示例 #!/usr/bin/env python import xlrd, sys, re, os workbook = xlrd.open_workbook( sys.argv[1] )for ...
- Android JNI之JAVA调用C/C++层
转载请声明:原文转自:http://www.cnblogs.com/xiezie/p/5929996.html 一.java调用本地函数的开发步骤: 1.编写本地方法的类(可以说是用来叙述本地方法的类 ...
- RabbitMQ三种Exchange模式(fanout,direct,topic)的特性 -摘自网络
RabbitMQ中,所有生产者提交的消息都由Exchange来接受,然后Exchange按照特定的策略转发到Queue进行存储 RabbitMQ提供了四种Exchange:fanout,direct, ...
- [现代程序设计]homework-03
Homework-03 队员: 11061193 薛亚杰 11061192 周敏轩 11061190 李孟 材料阅读 我们三个人将以下材料仔细阅读,觉得十分受益.下面是我们的总结和分享: 1)代 ...
- HDU 1312 http://acm.hdu.edu.cn/showproblem.php?pid=1312
#include<stdio.h> #include<string.h> #include<math.h> #include<stdlib.h> #de ...