Since you were able to access the Cloudera repo, you should be able to install the Oracle JDK on the agent with:     sudo apt-get install oracle-j2sdk1.8   If that does not work, you can install it with the instructions under Manually Installing OpenJDK   When starting, the agent looks through common paths for JDKs and will select the Oracle 1.8 JDK first if it finds it.   If you would prefer to use OpenJDK on all the systems, in Cloudera Manager navigate to Hosts > Hosts Configuration and set the Java Home Directory to your preferred JAVA_HOME. ... View more

Mr. Harsh, would you please have a look at my reply, please?   thanks  ... View more

This confirmes the package is installed correctly, and the JDK is installed to /usr/lib/jvm/java-8-oracle-cloudera/ You may want to use this as JAVA_HOME when configuring CM and the cluster to use this JDK ... View more