Working With Hadoop: localhost: Error: JAVA_HOME is not set

Question

I\'m working with Ubuntu 12.04 LTS.

I\'m going through the hadoop quickstart manual to make a pseudo-distributed operation. It seems simple and straightforward (eas

Answer 1

Check if your alternatives is pointing to the right one, you might actually be pointing to a different version and trying to alter the hadoop-env.sh on another installed version.

-alternatives --install /etc/hadoop/conf [generic_name] [your correct path] priority {for further check man page of alternatives}

to set alternatives manually,

alternatives --set [generic name] [your current path].