https://community.cloudera.com/t5/Support-Questions/send-data-from-python-to-nifi-http-request/m-p/193323#M155387 <P>The relevant part of the log is "Address already in use", looks like you've configured ListenHttp to listen on port 8081 but some other process is using that port already.</P> Tue, 27 Mar 2018 19:16:34 GMT mburgess 2018-03-27T19:16:34Z