Java Development Kit Installation
Some installation paths require that you install the Oracle Java Development Kit on cluster hosts before deploying Cloudera Manager, CDH, and managed services. To install the Oracle JDK, follow the instructions in Installing the Oracle JDK. The completed installation, or any already existing installation, must meet the following requirements.
Installing the Oracle JDK
The Oracle JDK installer is available both as an RPM-based installer for RPM-based systems, and as a binary installer for other systems.
- Download the .tar.gz file for one of the supported versions of the Oracle JDK from Java SE 7 Downloads or Java SE 6 Downloads. (These links are correct at the time of writing but change frequently.)
- Extract the JDK to /usr/java/jdk-version; for example /usr/java/jdk.1.7.0_nn, where nn is a supported version.
- In /etc/default/bigtop-utils, set JAVA_HOME to the directory where the JDK is installed; for example:
- Symbolically link the directory where the JDK is installed to /usr/java/default; for example:
ln -s /usr/java/jdk.1.7.0_nn /usr/java/default