Thank you André, This led to the right direction. Since the configuration file is required by a third party JAR that I don't build, the way to solve it was to add a src/main/resources path to the myProcessor-nar directory instead of the myProcessor-processor directory. The nar directory doesn't include a src/main/java but you can nevertheless add a src/main/resources path and add subfolders/files to it, e.g. NAR-INF/data/config.ini. Maven will copy automatically everything under src/main/resources to the target, hence it's not necessary to add the resources snippet to the pom.xml. So, now NiFi's work/nar/extensions/myProcessor-nar-1.0.nar-unpacked/NAR-INF folder contains my subfolder/file data/config.ini every time NiFi unpacks the NAR. I found this article helpful that explains the parts of a NAR and the three pom.xml files: https://www.javahotchocolate.com/notes/nifi-project.html Thanks @vafs!
... View more
