Step 2: Install Java Development Kit

CDP 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 CDP 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.

Requirements:

important

note
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. If you install the JDK anywhere else, there are additional steps required to configure Cloudera Manager with your chosen location. See Configuring a Custom Java Home Location.
The RHEL-compatible operating system supported by CDP Private Cloud Base 7 uses AES-256 encryption by default for tickets. To support AES-256 bit encryption in JDK versions lower than 1.8u161, you must install the Java Cryptography (JCE) Unlimited Strength Jurisdiction Policy File on all cluster and Hadoop user machines. Cloudera Manager can automatically install the policy files, or you can install them manually. For JCE Policy File installation instructions, see the README.txt file included in the jce_policy-x.zip file. JDK 1.8u161 and higher enable unlimited strength encryption by default, and do not require policy files.
On SLES platforms, do not install or try to use the IBM Java version bundled with the SLES distribution.

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