Currently we have no HA on the name node in a HDP 2.2 cluster in production.
We are trying to determine if we can add a new node and enable it has a standby namenode.
Our objective is to enable namenode HA on the hortonworks cluster without taking the cluster offline.
We have a process which pulls messages from MQ and puts it in HBase. Since the messages have a 10 sec expiry we cannot afford to have the cluster down. What do people do in such situations?