This is the documentation for Cloudera 5.3.x.
Documentation for other versions is available at Cloudera Documentation.

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.

Requirements

  Important:
  • You cannot upgrade from JDK 1.7 to JDK 1.8 while upgrading to CDH 5.3. The cluster must already be running CDH 5.3 when you upgrade to JDK 1.8.
  • On SLES 11 platforms, do not install or try to use the IBM Java version bundled with the SLES distribution. CDH does not run correctly with that version.

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.

  1. Download the .tar.gz file for one of the supported versions of the Oracle JDK from Java SE Downloads, Java SE 7 Downloads, or Java SE 6 Downloads. (These links are correct at the time of writing but change frequently.)
  2. Extract the JDK to /usr/java/jdk-version; for example /usr/java/jdk.1.7.0_nn or /usr/java/jdk.1.8.0_nn, where nn is a supported version.
  3. In /etc/default/bigtop-utils, set JAVA_HOME to the directory where the JDK is installed; for example:
    export JAVA_HOME=/usr/java/default
  4. 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
    • ln -s /usr/java/jdk.1.8.0_nn /usr/java/default