In a need to decommission a node from a Hadoop cluster based on HDP 2.2.4.2 I have realised that Ambari 2.0 delivered with HDP 2.2.4.2 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...
Anything I think might be interesting or useful. Planed to be mainly IT related but who knows what happens?