Steps for Java 8 setup on Cloudera Distribution Hadoop

1. Stop Cloudera Management Service
2. Stop Cloudera Cluster
3. Stop all Cloudera Agents (on all nodes) - sudo service cloudera-scm-agent stop
4. Stop the Cloudera Manager Server - sudo service cloudera-scm-server stop
5. Download JAVA 8 from Oracle using wget
6. Extract the JDK
• gunzip jdk-8u60-linux-x64.tar.gz 
• tar -xvf jdk-8u60-linux-x64.tar jdk1.8.0_60/
7. Copy the JDK folder to /usr/java/
8. Append export JAVA_HOME=/usr/java/jdk1.8.0_60/ to file /etc/default/cloudera-scm-server
9. Start Cloudera Manager Server - sudo service cloudera-scm-server start
10. Start all Cloudera Manager Agents - sudo service cloudera-scm-agent start
11. Navigate to Hosts -> Configuration -> Java Home Directory, and set it to/usr/java/jdk1.8.0_60
12. Finally, inside Cloudera Manager page, start the Cluster and the CM service. DONE!

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