Hello one last time, as follow-up to your last comment: "If the cluster NCM you are joining this node to already has an existing flow or templates, this node will fail to join because they will not match. NO need to reinstall to fix this if that is the case. Simply delete the flow.xml.gz file and the templates directory before starting it again. When it joins the cluster it will get the current flow and templates from the NCM." When the " start" command was originally issued (to accidently make this a standalone configuration) nothing had been configured - there was no NCM or node specific parameters defined. Bottomline: There were no other NiFi configurations previously in existence in this environment. Thanks again for your great answers and the articles you post to this site. They are very much appreciated. ... View more