Re-run Ambari Server Setup.

ambari-server setup

At the prompt to change the JDK, Enter y.

Do you want to change Oracle JDK [y/n] (n)? y

At the prompt to choose a JDK, Enter 1 to change the JDK to v1.8.

[1] - Oracle JDK 1.8 + Java Cryptography Extension (JCE) Policy Files 8

[2] - Oracle JDK 1.7 + Java Cryptography Extension (JCE) Policy Files 7

[3] - Custom JDK

If you choose Oracle JDK 1.8 or Oracle JDK 1.7, the JDK you choose downloads and installs automatically on the Ambari Server host. This option requires that you have an internet connection. You must install this JDK on all hosts in the cluster to this same path.

If you choose Custom JDK, verify or add the custom JDK path on all hosts in the cluster. Use this option if you want to use OpenJDK or do not have an internet connection (and have pre-installed the JDK on all hosts).

	Important
	If you use a custom JDK, AND if Kerberos is enabled with AES-256 encryption, you must also update your JCE security policy files on the Ambari Server and all hosts in the cluster to match the new JDK version. If you are running Kerberos and do not update the JCE to match the JDK, you will have issues starting services.

After setup completes, you must restart each component for the new JDK to be used by the Hadoop services.

Using the Ambari Web UI, restart all services.

Restart Ambari Server.

ambari-server restart