@Saisreenath According to this article: you should be in the folder containing the script you want to execute to set the execution permissions.   Nifi needs permissions to access the script.  It also needs permission to be able to execute the command you gave it.  In your error it is saying it cannot run the python command.  You may need to adjust that command path.   In summary make sure you give correct permissions to everything you put in Properties tab of the NiFi Processor, and use the correct paths for python. ... View more

@Bryan Bende : I have a workflow like HandleHttpRequest -> InvokeHttp -> Custom Processor -> HandleHttpResponse. My requirement is that I want to support multiple templated jsons and URL sent to HandleHttpRequest will have query params who values should replace some values in the templated jsons based on the template I need. These templated jsons are nested and complex in structure. Pleaseee suggest how to do this. Different posts mention about diff processors like EvaluateJsonPath, ReplaceText, UpdateAttribute and so on but which processor should I use to store my templated json and how can I do the values replacement. I am new to NiFi and request your help on this and I am basically from Java background. ... View more