Configuring Spark Environment Variables Using Cloudera Manager
Configure service-wide environment variables for all Spark applications in
         spark-env.sh as follows.
- Go to the Cloudera Manager Admin Console.
 - Navigate to the Spark 2 service.
 - Click the Configuration tab.
 - Search for the Spark Service Advanced Configuration Snippet (Safety Valve) for spark-conf/spark-env.sh property and add the paths for the environment variables you want to configure.
 - Click Save Changes to commit the changes.
 - Restart the service.
 - Deploy the client configuration.
 - Restart Cloudera Data Science Workbench.
 
