https://community.cloudera.com/t5/Support-Questions/Nifi-1-1-site-to-site-permissions-are-disabled-within-the/m-p/224582#M186446 <P><A rel="user" href="https://community.cloudera.com/users/76208/olivierdrouin.html" nodeid="76208" target="_blank">@Olivier Drouin</A> and <A rel="user" href="https://community.cloudera.com/users/78176/xaviercoudre.html" nodeid="78176" target="_blank">@Xavier COUDRE </A></P><P>-</P><P>At this time Remote Process Groups are only able to see "remote" input and output port. NiFi only treats input and output ports added to the root canvas of the target NiFi as remote Process groups.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="72427-screen-shot-2018-04-24-at-112055-am.png" style="width: 826px;"><img src="https://community.cloudera.com/t5/image/serverpage/image-id/15496i9FB852113B3DE750/image-size/medium?v=v2&amp;px=400" role="button" title="72427-screen-shot-2018-04-24-at-112055-am.png" alt="72427-screen-shot-2018-04-24-at-112055-am.png" /></span></P><P>So as you can see from the above diagram, your MiNiFi RPG will only be able to see the input port at the root level. You will then need to use an input port in each sub-process group to move the received FlowFiles from the root canvas level down in to Process group level 3. I completely understand the complexity this adds in a multi-nested process group dataflow design.</P><P>-</P><P>There is a Jira out there requesting an enhancement to NiFi to separate input/output ports into local and remote: components. <A href="https://issues.apache.org/jira/browse/NIFI-2933" target="_blank" rel="nofollow noopener noreferrer">https://issues.apache.org/jira/browse/NIFI-2933</A><BR />-<BR />However, my understanding is that there are significant design hurdles for such a change. There have been other design discussion around being able to connect directly from a top level process group to a deep nested process group without needing to create ports at each level.</P><P>-</P><P>Hope this helps to clarify things,</P><P>Matt</P> Sun, 18 Aug 2019 01:43:15 GMT MattWho 2019-08-18T01:43:15Z