HBase Distributed modes require an instance of HDFS. HBase depends on HDFS (Namenode, Datanodes) to perform operations like adding a file etc. So, if you a running cluster where HBase is also installed and you are upgrading HDFS to be HA i.e to Namenode-HA you should stop HBase service. Also, as Artem mentioned above after upgrading the Namenode to HA, change the distributed file system URI in hbase-site.xml to the name specified in the dfs.nameservices property in hdfs-site.xml. For example, suppose the HDFS HA property dfs.nameservices is set to mycluster in hdfs-site.xml. Specify that same value as below in hbase-site.xml's hbase.rootdir value: <!-- Configure HBase to use the HA NameNode nameservice --> <property> <name>hbase.rootdir</name> <value>hdfs://mycluster/hbase</value> </property> ... View more

Even I can't seem to reply now in that chain. So, I think that you will need to modify the $HBASE_HOME/conf/hadoop-metrics2-hbase.properties file on all the Region servers and the HBase Masters. And restart each of those services. Also, for the remote access JMX files, again you would need to add that on all the hosts where you want to do the monitoring and add reference to the JMX files in $HBASE_HOME/conf/hbase-env.sh files. This might be a tedious process doing it on all the hosts, so you might want to use the links in the previous answer for doing it via Ambari Or else give this is a try if the number of servers are few. Hope this helps. ... View more