Hadoop installation on windows

解決JAVA_HOME is incorrectly set.

Windows下解壓hadoop後要做一些配置

環境

我用的hadoop-2.7.2版本

jdk1.8.0_91

步驟

看看，如有疏漏，不吝請教。

1. 先將下載的的解壓

2. 配置環境變量 HADOOP_HOME
   需要事先安裝Java，並配置好JAVA_HOME的環境變量

   The only required environment variable is JAVA_HOME.

3. 測試配置

   • 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，先將jdk拷貝一份，不要放在 “Program Files”,帶空格的目錄下，如 C:\Java\jdk1.8.0_91

   然後修改 conf\hadoop-env.cmd 中的 JAVA_HOME

   修改前

   set JAVA_HOME=%JAVA_HOME%

   修改後

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

4. 測試

   • hadoop version

   Hadoop 2.7.2
   Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r b165c4fe8a74265c792ce23f546c64604acf0e41
   Compiled by jenkins on 2016-01-26T00:08Z
   Compiled with protoc 2.5.0
   From source with checksum d0fda26633fa762bff87ec759ebe689c
   This command was run using /H:/jahen/Documents/ApplicationDevelopment/hadoop-2.7.2/share/hadoop/common/hadoop-common-2.7.2.jar

5. 有關相應bin目錄下的winutils.exe 等文件

可以下載

winutils.exe

參考

Hadoop installation on windows