@ShaatH Yes, it is mandatory to disable yarn ats hbase as described in the document. It will only stop and destroys the saved config of ats-hbase but your actual data will be present. We are destroying the ats-hbase because of the old non-HA or non-secure configuration, destroy will remove the old configuration so that after enabling the HA, ats-hbase can pick up the right and latest configs.     ... View more