Preparing the Cluster for Upgrade
Before you begin the upgrade process, you will need to perform a series of steps to prepare the cluster for upgrade. These steps are described in the "Getting Ready To Upgrade" section of this guide, which you will need to follow before continuing to upgrade Ranger. Some of these steps include:
Backing up HDP directories
Stopping all long-running applications and services.
Backing up the Hive and Oozie metastore databases.
Backing up Hue
Backing up specific directories and configurations