I am having the same problem with head as the command, -1 as the argument, and csv in the content of my flowfile. I read someplace that nifi "lost the state"; what does that mean? I have the flowfile, it has content. Why can't the ESC processor send the first line of the file to the attribute I name?  ... View more

Very helpful article - thank you. I am implementing this approach right now but I need to rotate my custom log file when it reaches # MB. Can anyone show me how to do that in the Groovy code above? The article says it can be done (for the given groovy code, it is easy to build rolling logic to your custom log files) but leaves it at that. ... View more