Hadoop预装示例Jars [英] Hadoop preinstalled example Jars

问题描述

我刚刚在本地机器上成功设置了Hadoop。我正在跟随刚刚买的一本流行的书中的一个例子。我正在尝试获得安装附带的所有hadoop示例的列表。我键入以下命令来执行此操作：

  bin / hadoop jar hadoop  -  *  -  examples.jar 
  

一旦我输入这个，我应该得到一个Hadoop示例的列表？但是我看到的只是这个错误信息：

 不是有效的JAR：/ home / user / hadoop / hadoop  -  *  - .jar 
  

如何解决这个问题？这是一个简单的权限问题？

解决方案

你会发现在$ $ $ $ $ $ $ $ $ $ $ $ $ $ hadoop / mapreduce / hadoop - * - examples * .jar

I just successfully set up Hadoop on my local machines. I am following one of the examples in a popular book I just bought. I am trying to get a list of all hadoop examples that comes with installation. I type the following command to do so:

bin/hadoop jar hadoop-*-examples.jar

Once I enter this I am supposed to get a list of Hadoop examples right? However all I see is this error message:

Not a valid JAR: /home/user/hadoop/hadoop-*-examples.jar

How do I solve this problem? Is it just a simple permission issue?

解决方案

you will find the jar in $HADOOP_HOME/share/hadoop/mapreduce/hadoop-*-examples*.jar

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