https://community.cloudera.com/t5/Support-Questions/NiFi-Need-to-help-to-merging-combine-join-2-Json-FlowFile/m-p/370157#M240633 <P>Hi,</P><P>I'm not seeing any difference in the JsonTreeReader\Writer . I'm not sure why you are not getting the expected output. The only difference I see is that I'm using 1.16 version and you are on 1.20 so I'm not sure if the behavior is different between the two versions even though I suspect its the case. To troubleshoot and find out , try to create the same flow I created and use the GeneratedFlowFile and ReplaceText to generate the output A &amp; B from your post above. If that works then I would double check your original flow and make sure that InvokeHttp is generating the desired output and the same response output is making it to the ForkEnrichment\JoinEnrichment as designed.</P><P>Let me know how that goes.</P> Fri, 05 May 2023 13:37:21 GMT SAMSAL 2023-05-05T13:37:21Z