Parameters without default values

[nicola907]

Hi everyone.
I want to use the "fluent-plugin-mqtt" plugin to write some logs into mqtt.
This is my current configuration:

<match docker.logify.*>
  @type mqtt
  host mqtt-broker
  port 1883
  topic_prefix fluentd
</match>

The problem is that I get an error saying the there are parameters without default values:

/usr/local/lib/ruby/gems/3.2.0/gems/fluentd-1.16.3/lib/fluent/config/section.rb:224:in `block in generate': format: init is specified, but there're parameters without default values:@type (ArgumentError)

raise ArgumentError, "#{name}: init is specified, but there're parameters without default values:#{missing_keys.join(',')}"