Steps to Upgrade the JDK on an Oracle Big Data Service on OCI CDH Cluster
(Doc ID 2903039.1)
Last updated on APRIL 17, 2023
Applies to:
Big Data Service on OCI - Version N/A and laterLinux x86-64
Purpose
This document provides generic steps for upgrading the JDK on an Oracle Big Data Service on OCI (BDS) with CDH cluster to a higher release.
Scope
BDS with CDH users wanting to upgrade the JDK to the latest supported release.
Details
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In this Document
| Purpose |
| Scope |
| Details |
| Introduction |
| Prerequisites |
| Download the rpm based jdk1.8.0_<latest_version> from from Technet(OTN) and copy the file to the BDS MN0 node at any location you choose. |
| Verify current BDS with CDH and JDK versions |
| Confirm the BDS with CDH cluster is healthy |
| Installing the Higher JDK Version |
| In CM stop CDH cluster services and CM mgmt services. |
| Copy the jdk-8u<latest_version>-linux-x64.rpm downloaded to the MN0 node of the cluster to all nodes to any staging location |
| Install the latest JDK |
| When the installation is complete /usr/java/jdk1.8.0_<latest_version> will be present |
| Stop the Cloudera Manager agent and server services |
| Update the JDK 1.8.0_<latest_version> with the correct policy files, local_policy.jar and US_export_policy.jar |
| Change the "latest" symlink link /usr/java/latest to point to the new version if necessary |
| Check the links to the java executables and update the links to the java executables if necessary |
| Update the Cloudera Manager Server configuration file /etc/default/cloudera-scm-server to to set JAVA_HOME to /usr/java/default if it is not already done |
| Start the Cloudera Manager server and agent services |
| In Cloudera Manager start the mgmt and cluster services. Then deploy the client configuration |
| Make sure the Cloudera Manager 'Java Home Directory' property is set to /usr/java/default |
| Post Install Verifications |
| Verify cluster is in "Good" health in CM |
| Run cluster checker utility |
| Verify the java version |
| If you want to check the JDK version on JDK 8 and higher use the following |
| Verify that the alternatives for java and javac are picking up the latest version i.e. the version which was just installed, if necessary. |
| Verify that the alternatives are set to auto |
| Check the alternatives for java and javac are picking up the latest version i.e. the one just installed |
| Verify the Java used by Cloudera Manager is updated |
| Verify the Java used by the Cloudera Manager Management Services is updated |
| Ensure Cloudera Manager Server will pick up the latest version of java |
| Post Install Steps |