Hadoop ERROR JAVA HOME is not set

Question

I m trying to install Hadoop on Ubuntu 11 10  I set the JAVA HOME variable in the file conf hadoop-env sh to      export JAVA HOME  usr lib jvm java-1 6 0-openjdk   and then I execute these commands  Standalone Operation      mkdir input    cp conf   xml input    bin hadoop jar hadoop-examples-  jar grep input output  dfs a-z        cat output     but I have the following error when executing the third command      ERROR   JAVA HOME is not set   Is the JAVA HOME variable not set correctly

User · Answer

You should set JAVA HOME in the hadoop-env sh file also which is in the Hadoop configuration directory  By default the JAVA HOME setting line is commented

User · Answer

The solution that worked for me was setting my JAVA HOME in  etc environment  Though JAVA HOME can be set inside the  etc profile files  the preferred location for JAVA HOME or any system variable is  etc environment   Open  etc environment in any text editor like nano or vim and add the following line   JAVA HOME   usr lib jvm your java directory    Load the variables   source  etc environment   Check if the variable loaded correctly   echo  JAVA HOME

User · Answer

Copy this export JAVA HOME  usr lib jvm java-1 6 0-openjdk to hadoop-env sh file    JAVA HOME is the location where java binaries are present

User · Answer

hadoop ERROR   JAVA HOME is not set   Above error is because of the space in between two words   Eg  Java located in  C  Program Files Java --   Space in between Program and files would cause the above problem  If you remove the space  it would not show any error

User · Answer

I tried the above solutions but the following worked on me  export JAVA HOME  usr java default

User · Answer

Type echo  JAVA HOME in your terminal to be sure your JAVA HOME is set   You can also type java -version to know what version of java you are actually using   By the way  reading your description it seems your actually writing  export JAVA HOME  usr lib jvm java-1 6 0-openjdk   in the file conf hadoop-env sh  you should write it in your terminal or in    bashrc or    profile then type source  lt  path to modified file  gt

User · Answer

In some distributives CentOS OpenSuSe      will work only if you set JAVA HOME in the  etc environment

User · Answer

Make sure that you have removed the comment tag and changed your JAVA HOME in the hadoop-env sh as well as the appropriate  bashrc and or  profile     export JAVA HOME  usr lib jvm java-1 6 0-openjdk   should be  export JAVA HOME  usr lib jvm java-1 6 0-openjdk   You can set your JAVA HOME and PATH for all users  make sure you haven t previously set this to the wrong path  in  etc profile   Also  don t forget to activate the new change by logging-out in or by executing source  etc profile

User · Answer

Here we provide simple steps to setup JAVA HOME while installing of Hadoop      Step1  Goto Java library path  lib jvm   Then set the JAVA HOME  amp  PATH in  bashrc file   Source   http   commandstech com hadoop-error-java home-is-not-set-and-could-not-be-found-in-hadoop-installation      Step 2   Once it is done then go with Hadoop env file then update it    After once it is done then stop the daemons and start daemons once again

User · Answer

You can add in your  bashrc file   export JAVA HOME   readlink -f  usr bin java   sed  s bin java       and it will dynamically change when you update your packages

User · Answer

I tried changing  etc environment   JAVA HOME   usr lib jvm java-11-openjdk-amd64   on the slave node  it works

User · Answer

I solved this in my env  without modify hadoop-env sh  You d be better using  bin bash as default shell not  bin sh  Check these before    You have already config java and env  success echo  JAVA HOME  right config hadoop   echo  SHELL in every node  check if print  bin bash if not  vi  etc passwd  add  bin bash at tail of your username ref      Changing default shell in Linux      https   blog csdn net whitehack article details 51705889

[linux] Hadoop: «ERROR : JAVA_HOME is not set»

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