On centos 7, I've installed logstash, and beats via the repo mentioned in the docs. The very first test at "https://www.elastic.co/guide/en/logstash/current/first-event.html" works.
Now I'm trying "https://www.elastic.co/guide/en/logstash/current/advanced-pipeline.html" Beats and Logstash start (i think) without error. Port 5044 is listening. Yet I don't see any of the log records echoed to stdout in the console where logstash is running.
What am I doing wrong? How to debug?