JAVA _Home is not set in Hadoop

Question

I am a beginner with hadoop and trying to install and run hadoop in my Ubuntu as a single node cluster. This is my JAVA_HOME in my hadoop_env.sh

# The java          


        

Answer 1

I had the same error and solved it with Soil Jain's remark, but to make it even a bit more clear: the hadoop-env.sh uses an expression such as

export JAVA_HOME=${JAVA_HOME}

if you hard-code the path to your JVM installation it works

export JAVA_HOME=/usr/lib/jvm/java...

this resolution by environmental variable as is seems to fail. Hard-coding fixed the problem for me.