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I am trying to install Hadoop 0.23 on my fedora 13 but its not getting installed.On web every were there is support for hadoop 0.20 installation. I am trying installation from here. Every time i am getting error ,

Error: JAVA_HOME is not set.

I also have added JAVA_HOME in my .bashrc file for current user. When i am doing echo $JAVA_HOME I can see it.

Can any one guide me how to install it, nice article or link will work. Or if there are some steps I need to follow?

Kenny Rasschaert
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CodeBanger
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  • Where exactly do you get the error? –  Dec 05 '11 at 17:53
  • When installing it always ask for JAVA_HOME and if i am setting in my environment variables , its its not working. –  Dec 06 '11 at 05:00

2 Answers2

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You have to configure JAVA_HOME in hadoop-env.sh located in $HADOOP_INSTALL/hadoop/conf. See http://wiki.apache.org/hadoop/GettingStartedWithHadoop for details.

  • BTW, the URL is for pre-0.23 release and Q was abt 0.23 release. I was able to run 0.23 without making any changes to the hadoop-env.sh. Not sure why it's not working for CodeBanger. – Praveen Sripati Dec 06 '11 at 04:11
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    In 0.23 there is no hadoop-env.sh file in conf folder.In conf folder there is yarn-evn.sh,yarn-site.xml and slaves file. –  Dec 06 '11 at 04:57
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With hadoop-0.23, the default config directory for HDFS is $HADOOP_INSTALL/etc/hadoop, which doesn't contain a hadoop-env.sh file by default. You should create hadoop-env.sh in this directory, if you haven't already, and set JAVA_HOME there.