Prerequisites for enabling HDFS HA using Cloudera Manager

There are certain prerequisites that your cluster must satisfy before HDFS HA can be enabled using Cloudera Manager.

You must perform the following tasks before enabling HDFS HA:

Ensure that you perform all the required configuration and setup tasks.
Enabling and disabling HA causes a service outage for the HDFS service and all services that depend on HDFS. Before enabling or disabling HA, ensure that there are no jobs running on your cluster.
Ensure that you have a ZooKeeper service configured.