Hadoop on Windows - “Error JAVA_HOME is incorrectly set.”

Question

I\'m trying to get Hadoop running \'Local Mode\' on my Windows machine. I\'ve been using this guide: http://hadoop.apache.org/docs/r1.2.1/single_node_setup.html

When

Answer 1

like the other answers, your java environment path must not contain space. The solution is as follows:

1. In the cmd line, charge the directory that contain the jdk (in my case C:\Program Files\Java\jdk1.8.0_73).
2. execute the following line "for %I in (.) do echo %~sI" to display the short name of your installed jdk (in my case C:\PROGRA~1\Java\JDK18~1.0_7)
3. in the file "hadoop-env.cmd", change the line "JAVA_HOME=%JAVA_HOME%" with "JAVA_HOME=C:\PROGRA~1\Java\JDK18~1.0_7".
4. run again the file "hadoop-env.cmd" and it will work correctly.

Answer 2

Try removing @ from @rem in hadoop-env.cmd and set JAVA_HOME=%JAVA_HOME%

rem The java implementation to use.  Required.

set JAVA_HOME=%JAVA_HOME%

Then try running hdfs namenode -format

This solution worked for me

Answer 3

in hadoop-config.xml， the logic is

if not exist %JAVA_HOME%\bin\java.exe ( echo Error: JAVA_HOME is incorrectly set. echo Please update %HADOOP_HOME%\conf\hadoop-env.cmd goto :eof )

if your java environment path contains space, such as "C:\Program Files\java\xxxxx" , the word 《Program Files》 contains a space, so CMD can't identificate

SO your can change the path instead.

Answer 4

if your java environment path contains space, such as "C:\Program Files\java\xxxxx" , the word 《Program Files》 contains a space, so CMD can't identificate

this is the right answer

Answer 5

Use "%JAVA_HOME%" in conf\hadoop-env.cmd

Answer 6

 set JAVA_HOME=C:\Program Files\Java\jdk1.8.0_131\

Above configuration was throwing same error as yours. I updated above with below in hadoop-env.cmd which is infact SFN

set JAVA_HOME=C:\Progra~1\Java\jdk1.8.0_131\

This allowed me to change/have different java version than that of system.