Install java 8 on an emr machine automatically.

emr_bootstrap_java_8_ubuntu.sh

# Check java version
JAVA_VER=$(java -version 2>&1 | sed 's/java version "\(.*\)\.\(.*\)\..*"/\1\2/; 1q')

if [ "$JAVA_VER" -lt 18 ]
then

    echo "Getting add-apt-repository"
    wget --no-check-certificate --no-cookies "https://blog.anantshri.info/content/uploads/2010/09/add-apt-repository.sh.txt" -O add-apt-repository.sh

    echo "Adding oracle java ppa"
    sudo sh add-apt-repository.sh ppa:webupd8team/java

    echo "updating"
    sudo apt-get update

    echo "Setting up installation..."
    echo "oracle-java8-installer shared/accepted-oracle-license-v1-1 select true" | sudo debconf-set-selections

    echo "Installing..."
    sudo apt-get install -y oracle-java8-installer

    echo "Setting JAVA_HOME to java 8"
    echo 'export JAVA_HOME=/usr/lib/jvm/java-8-oracle' > /home/hadoop/conf/hadoop-user-env.sh
fi

# Check java version again
JAVA_VER=$(java -version 2>&1 | sed 's/java version "\(.*\)\.\(.*\)\..*"/\1\2/; 1q')


echo ""
echo "Java version is $JAVA_VER!"
echo "JAVA_HOME: $JAVA_HOME"
echo "JRE_HOME: $JRE_HOME"
echo "PATH: $PATH"