There are many warnings in my logstash logfile about messages with too many fields:
"reason"=>"Limit of total fields  in index [logstash-type-YYYY.MM] has been exceeded"
How to see problematic messages? The only method I know about it's add "file" output filter to the Logstash config and look for a long messages. Running Logstash with 'debug' level seems me overkill.
I'm curious is there more elegant method exist.