Hadoop installation on windows

解决JAVA_HOME is incorrectly set.

Windows下解压hadoop后要做一些配置

环境

我用的hadoop-2.7.2版本

jdk1.8.0_91

步骤

看看，如有疏漏，不吝请教。

1. 先将下载的的解压

2. 配置环境变量 HADOOP_HOME
   需要事先安装Java，并配置好JAVA_HOME的环境变量

   The only required environment variable is JAVA_HOME.

3. 测试配置

   • echo %JAVA_HOME%

   C:\Program Files\Java\jdk1.8.0_91

   • 配置HADOOP_HOME

   H:\jahen\Documents\ApplicationDevelopment\hadoop-2.7.2

   • hadoop version

   如果提示

   Error: JAVA_HOME is incorrectly set.
   Please update H:\jahen\Documents\ApplicationDevelopment\hadoop-2.7.2\conf\hadoop-env.cmd

   那就，先将jdk拷贝一份，不要放在 “Program Files”,带空格的目录下，如 C:\Java\jdk1.8.0_91

   然后修改 conf\hadoop-env.cmd 中的 JAVA_HOME

   修改前

   set JAVA_HOME=%JAVA_HOME%

   修改后

   set JAVA_HOME=C:\Java\jdk1.8.0_91

4. 测试

   • hadoop version

   Hadoop 2.7.2Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r b165c4fe8a74265c792ce23f546c64604acf0e41Compiled by jenkins on 2016-01-26T00:08ZCompiled with protoc 2.5.0From source with checksum d0fda26633fa762bff87ec759ebe689cThis command was run using /H:/jahen/Documents/ApplicationDevelopment/hadoop-2.7.2/share/hadoop/common/hadoop-common-2.7.2.jar

5. 有关相应bin目录下的winutils.exe 等文件

可以下载

winutils.exe

参考

Hadoop installation on windows