Logstash and Beat float compare

Elastic Stack Logstash
1

I am sending metricbeat data via logstash input into elasticsearch and would like to set up a notification on low disk space.

I tried something like:

output {
  if [type] == "beats" and [metricset][name] == "filesystem" and
  [system][filesystem][used][pct] >= 0.5000 and "throttled" not in [tags] {
    #
    # Send notification.
    #
  }
}

But I am getting an error:

ClassCastException: class org.jruby.RubyFloat cannot be cast to class java.lang.Long
(org.jruby.RubyFloat is in unnamed module of loader 'app'; java.lang.Long 
is in module java.base of loader 'bootstrap'),

Is there an elegant way to trigger based on beat disk usage [system][filesystem][used][pct]?

2

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