JAVA _Home is not set in Hadoop

user_1495779 0
Viewed 31468

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 implementation to use.
export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-i386/
export HADOOP_CONF_DIR=${HADOOP_CONF_DIR:-"/etc/hadoop"}

But when I run it the following errors come-

Starting namenodes on [localhost]
localhost: Error: JAVA_HOME is not set and could not be found.
localhost: Error: JAVA_HOME is not set and could not be found.
Starting secondary namenodes [0.0.0.0]
0.0.0.0: Error: JAVA_HOME is not set and could not be found.

How do I remove this error?

hadoop installation java
8 Answers

First, you must set JAVA_HOME in your hadoop_env.sh . (your local JAVA_HOME in .bashrc would likely to be ignore somehow)

# The java implementation to use.
export JAVA_HOME=/usr/lib/jvm/default-java

Then, set HADOOP_CONF_DIR point to directory of your hadoop_env.sh . In ~/.bashrc, add the following line:

HADOOP_CONF_DIR="/usr/local/hadoop/etc/hadoop"
export HADOOP_CONF_DIR

Where /usr/local/hadoop/etc/hadoop is the directory contained hadoop_env.sh

user_52506200
Related