Skip to main content


Showing posts from June, 2015

Hortonworks HDP 2 moving master componenst to other nodes

In a need to decommission a node from a Hadoop cluster based on HDP I have realised that Ambari 2.0 delivered with HDP can not move History Server and Falcon Server master components to another node. Simply the functionality is missing. I could use the Ambari web UI for every other service I wanted to move but not these two. So looking around I found a this mail which I am summarising in the below command set. Stop Falcon Server and History Server via the Ambari UI. Execute below commands and do not forget to specify values for the first five lines :) AMBARI_SERVER_HOST= CLUSTERNAME=mycluster HOSTNAME= TARGET_HOSTNAME= PASS= curl -i -u admin:${PASS} -H 'X-Requested-By: ambari' -X DELETE http://${AMBARI_SERVER_HOST}:8080/api/v1/clusters/${CLUSTERNAME}/hosts/${HOSTNAME}/host_components/HISTORYSERVER curl -i -u admin:${PASS} -H 'X-Requested-By: ambari' -X POST -d'{"HostRoles":{"component_name":"HISTORYSERVER