The correct JDK must be installed on all the nodes in your cluster. To manually deploy the JDK:
Check the version. From a terminal window, type:
java -version
(Optional) Uninstall the Java package if the JDK version is less than v1.6 update 31.
rpm -qa | grep java yum remove {java-1.x.0-jdk-1.x.0.0-1.45.1.11.1.el6.x86_64}
(Optional) Verify that the default Java package is uninstalled.
which java
Download the Oracle 64-bit JDK jdk-6u31-linux-x64.bin from the Oracle download site.
Change directory to the location where you downloaded the JDK and run the install.
mkdir /usr/jdk1.6.0_31 cd /usr/jdk1.6.0_31 chmod u+x $JDK_download_directory/jdk-6u31-linux-x64.bin $JDK_download_directory/jdk-6u31-linux-x64.bin
Create symbolic links (symlinks) to the JDK.
mkdir /usr/java ln -s /usr/jdk1.6.0_31/jdk1.6.0_31 /usr/java/default ln -s /usr/java/default/bin/java /usr/bin/java
Set up your environment to define
JAVA_HOME
to put the Java Virtual Machine and the Java compiler on your path.export JAVA_HOME=/usr/java/default export PATH=$JAVA_HOME/bin:$PATH