A quick update : I did reinstall Ambari completely and also re-check all my config files : at least now the add widget is working but still does not display data (while phoenix shows data in hbase) I suspect something with the fact that I collect data on the 3 NiFi nodes while I try to display them for the whole service ... ... View more

on general : I follow the tuto from http://bryanbende.com/development/2015/07/31/ambari-metrics-part2-metrics-collector/ and install guidelines (http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.0.0/bk_Installing_HDP_AMB/content/index.html) - Ambari metrics is up and working correctly to monitor systems and HDFS usage. - I did install the repo from Horton (HDP with ambari 2.2) for Nifi I started with the repo from Ali and modified it to create the NCM node and the slaves nodes. - I also used the AmbariReport in Nifi (I think work from Bryan in the Nifi service provided by Ali) -I checked with phoenix :data are present in database ... View more