fluent/fluentd · error · ArgumentError

arg is available only with name

Error message

arg is available only with name

What it means

Error "arg is available only with name" thrown in fluent/fluentd.

Source

Thrown at lib/fluent/config/element.rb:56

        @target_worker_ids = []
      end

      attr_accessor :name, :arg, :unused, :v1_config, :corresponding_proxies, :unused_in
      attr_writer :elements
      attr_reader :target_worker_ids

      RESERVED_PARAMETERS_COMPAT = {
        '@type' => 'type',
        '@id' => 'id',
        '@log_level' => 'log_level',
        '@label' => nil,
      }
      RESERVED_PARAMETERS = RESERVED_PARAMETERS_COMPAT.keys

      def elements(*names, name: nil, arg: nil)
        raise ArgumentError, "name and names are exclusive" if name && !names.empty?
        raise ArgumentError, "arg is available only with name" if arg && !name

        if name
          @elements.select{|e| e.name == name && (!arg || e.arg == arg) }
        elsif !names.empty?
          @elements.select{|e| names.include?(e.name) }
        else
          @elements
        end
      end

      def add_element(name, arg = '')
        e = Element.new(name, arg, {}, [])
        e.v1_config = @v1_config
        @elements << e
        e
      end

      def inspect

View on GitHub (pinned to dd45c6e18d)

When it happens

Trigger: Thrown at lib/fluent/config/element.rb:56 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of fluent/fluentd@dd45c6e18d (2026-08-21). Data as JSON: /api/errors/6f74a734f0ed4e0a. Report an issue: GitHub.