Listens for messages sent by libbeat compatible clients (e.g. filebeats,
metricbeats, etc) using Libbeat's 'output.logstash', writing its JSON
formatted payload to the content of a FlowFile.This processor replaces
the now deprecated ListenLumberjack
In other words, configure winlogbeats to ship to logstash and point it to the nifi processor and you should be good.