mapred.JobClient: No job jar file set. User classes may not be found. See JobConf(Class) or JobConf#setJar(String).
报错详情:
WARN mapred.JobClient: No job jar file set. User classes may not be found. See JobConf(Class) or JobConf#setJar(String).
10/08/16 15:25:49 INFO input.FileInputFormat: Total input paths to process : 4
10/08/16 15:25:50 INFO mapred.JobClient: Running job: job_201008161439_0004
10/08/16 15:25:51 INFO mapred.JobClient: map 0% reduce 0%
10/08/16 15:26:00 INFO mapred.JobClient: Task Id : attempt_201008161439_0004_m_000000_0, Status : FAILED
java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.WordCount2$WordCountMapper
at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:808)
at org.apache.hadoop.mapreduce.JobContext.getMapperClass(JobContext.java:157)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:532)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at org.apache.hadoop.mapred.Child.main(Child.java:170)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.WordCount2$WordCountMapper
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
报错原因:
找不到job任务运行的资源,如map类、reduce类等。
解决方案:
新增
public class InitMain{
Job job = new Job();
job.setJarByClass(InitMain.class); //只要是Initmain类所在包下的任一个类名都可以,默认为当前 job所在类名。
}
扩展:
MapReduce 中job.setJarByClass()方法的疑惑
mapred.JobClient: No job jar file set. User classes may not be found. See JobConf(Class) or JobConf#setJar(String).的更多相关文章
- eclipse下提交job时报错mapred.JobClient: No job jar file set. User classes may not be found.
错误信息: 11/10/14 13:52:07 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. A ...
- eclipse 运行 mapreduce程序报错 No job jar file set. User classes may not be found. See JobConf(Class) or JobConf#setJar(String).
报错信息 17/07/06 17:00:27 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Ap ...
- eclipse 中的 jar file 和 runnable jar file的区别
转自于:http://blog.csdn.net/lijiecong/article/details/6266234 java最难学的就是角落的东东了,不愧叫做java平台.搜索了一把总算明白了. 直 ...
- 现网环境业务不影响,但是tomcat启动一直有error日志,ERROR org.apache.catalina.startup.ContextConfig- Unable to process Jar entry [module-info.class] from Jar [jar:file:/home/iufs/apache-tomcat/webapps/iufs/WEB-INF/lib/asm
完整的错误日志信息: 2019-03-19 15:30:42,021 [main] INFO org.apache.catalina.core.StandardEngine- Starting Ser ...
- An SPI class of type org.apache.lucene.codecs.PostingsFormat with name 'Lucene50' does not exist. You need to add the corresponding JAR file supporting this SPI to your classpath. The current classp
背景介绍: 当ES中guava库与hive等组件的库冲突时,对Elasticsearch库进行shade,relocate解决库冲突问题. 当使用"org.apache.maven.plug ...
- org.apache.jasper.JasperException:Unable to read TLD "META-INF/c-1_0-rt.tld" from JAR file jstl-1.2.jar
前两天把项目从eclipse EE版搬到MyEclipse中了.配置好jdk,确定build path中没有报错后,在tomcat中运行.结果,报错: org.apache.jasper.Jasper ...
- Eclipse------使用Debug As时报错java.lang.IllegalStateException: Failed to read Class-Path attribute from manifest of jar file:/XXX
报错信息: java.lang.IllegalStateException: Failed to read Class-Path attribute from manifest of jar file ...
- Unable to read TLD "META-INF/c.tld" from JAR file
Unable to read TLD "META-INF/c.tld" from JAR file CreationTime--2018年7月18日17点46分 Author: ...
- Failed to read Class-Path attribute from manifest of jar file:/XXX问题
java.lang.IllegalStateException: Failed to read Class-Path attribute from manifest of jar file:/XXX ...
随机推荐
- H5手机端按钮点击一次却触发了多次点击事件
方案:在点击事件方法中加入以下语句 event.stopPropagation();
- 【spark】示例:求极值
我们有这样的数据 1.建立SparkContext读取数据 (1)建立sc (2)通过sc.textFile()读取数据创建Rdd 2.过滤数据 通过filter(line => line.tr ...
- Ubuntu源更新
Ubuntu12.04的源在 /etc/apt/sources.list 中, 进入 /etc/apt/ 先进行备份 然后用根用户权限打开sources.list. sudo gedit /etc/ ...
- jQuery中this与$(this)的区别
起初以为this和$(this)就是一模子刻出来.但是我在阅读时,和coding时发现,总不是一回事,这里就谈谈this与$(this)的区别. jQuery中this与$(this)的区别 $(&q ...
- IE中iframe兼容性问题
在使用iframe的时候,有时候想要让调用的iframe框架里面的不显示白背景,让它变得透明,在firefox是透明的,但是在IE浏览器却不透明. 这个其实比较容易解决,只需要增加一个属性即可. 就是 ...
- 自己如何获取ADO连接字符串
自己如何获取ADO连接字符串 摘自:http://blog.csdn.net/zyq5945/article/details/5586423 有时候我们参考网上的ADO连接字符串写未必就能连接上数据库 ...
- mysql 存储过程查询语句
可以用 命令"show PROCEDURE status"查看所有的存储过程或检索系统表"mysql.proc"来查询已有的存储过程.例如:用show PROC ...
- 智能电视软件安装(WIFI上网)
智能电视软件上网(电视可连接无线网的称之为:智能电视) 1.安装当贝市场 链接:http://www.dangbei.com/ 2.安装电视家浏览器 链接:http://www.tvapk.net/f ...
- 软件安全攻防--缓冲区溢出和shellcode
缓冲区溢出漏洞实验报告 实验楼中有seed缓冲区溢出漏洞实验,实验内容与课本中要求的实验基本一致,便利用实验楼提供好的现成实验环境来完成这次的实践内容. 一.实验简介 缓冲区溢出是指程序试图向缓冲区写 ...
- 2017-2018-2 20179215《网络攻防实践》seed缓冲区溢出实验
seed缓冲区溢出实验 有漏洞的程序: /* stack.c */ /* This program has a buffer overflow vulnerability. */ /* Our tas ...