How can i remove field?

Elastic Stack Logstash
1

Hi!
I'd like to remove inner filed "message"becouse its epmty.
How can i make this?
My rule:

if [message] == "" { drop { } }

But its not working.
Can anyone take advice for me?

2

I want to find problem with filebeat, why it sends to logstash empty message filed, or process it in logstash.
So what about this?

3

It could very well be because you have consecutive newlines in your logs. You can try filtering these in Logstash based on regular expression:

if [message] =~ /^$/ {
    drop {}
}