question Check when no output produced in Support Questions

question Check when no output produced in Support Questions https://community.cloudera.com/t5/Support-Questions/Check-when-no-output-produced/m-p/314051#M225874 <P>I would like to be able to check when a Nifi processor run successfully  but <STRONG>without producing any output</STRONG>, i.e.,  nothing passed to the downstream process for further processing.  I would like to configure an email notification that no output produced by the processor.   Any help would be appreciated on how to make such a  Nifi validation process to so such check  generating one-line text, such as "Nothing produced by XYZ processor"</P> Mon, 05 Apr 2021 15:52:58 GMT Love-Nifi 2021-04-05T15:52:58Z