Step 2: Install Java Development Kit

Cloudera Private Cloud Base requires a JDK installed on all hosts., you can either install OpenJDK or a Oracle JDK directly from Oracle.

There are several options for installing a JDK on your Cloudera Private Cloud Base hosts:

Install OpenJDK 8^{^*} on the Cloudera Manager server host and then allow Cloudera Manager to install OpenJDK 8^{^*} on its managed hosts. This is the automatic option.
Manually install a supported JDK on all cluster hosts before installing Cloudera software.
Please see the Cloudera Support Matrix for detailed information about supported JDKs.

important

Cloudera strongly recommends installing Oracle JDK at /usr/java/<jdk-version> and OpenJDK at /usr/lib/jvm, which allows Cloudera Manager to auto-detect and use the correct JDK version.

When installing the relevant JDK version using yum/zypper/apt-get (depending on the OS) ensure that the OS will handle the installation location and ensure the environment is updated accordingly so Cloudera services will auto-detect the correct version.

Also, it is possible (though not recommended) to deploy multiple JDK versions on the same server, as long as it is done using the above package deployment process, and using the OS tools (such as "alternatives --config java" application in RHEL) to set the relevant JDK release to use.

Requirements:

The installed JDK must be a supported version as documented in .
The same version of the JDK must be installed on each cluster host.

^* Azul OpenJDK, OpenJDK 8, OpenJDK 11, and OpenJDK 17 are TCK certified for CDP.