fluent/fluentd · error · ObsoletedParameterError

'#{name}' parameter is already removed: #{opts[:obsoleted]}

Error message

'#{name}' parameter is already removed: #{opts[:obsoleted]}

What it means

Error "'#{name}' parameter is already removed: #{opts[:obsoleted]}" thrown in fluent/fluentd.

Source

Thrown at lib/fluent/config/section.rb:204

            if section_params[varname].nil?
              unless proxy.defaults.has_key?(varname) && proxy.defaults[varname].nil?
                logger.error "config error in:\n#{conf}" if logger
                raise ConfigError, "'#{name}' parameter is required but nil is specified"
              end
            end

            # Source of definitions of deprecated/obsoleted:
            # https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Deprecated_and_obsolete_features
            #
            # Deprecated: These deprecated features can still be used, but should be used with caution
            #             because they are expected to be removed entirely sometime in the future.
            # Obsoleted: These obsolete features have been entirely removed from JavaScript and can no longer be used.
            if opts[:deprecated]
              logger.warn "'#{name}' parameter is deprecated: #{opts[:deprecated]}" if logger
            end
            if opts[:obsoleted]
              logger.error "config error in:\n#{conf}" if logger
              raise ObsoletedParameterError, "'#{name}' parameter is already removed: #{opts[:obsoleted]}" + section_stack
            end
          end
          unless section_params.has_key?(varname)
            logger.error "config error in:\n#{conf}" if logger
            raise ConfigError, "'#{name}' parameter is required" + section_stack
          end
        end

        check_unused_section(proxy, conf, plugin_class)

        proxy.sections.each do |name, subproxy|
          varname = subproxy.variable_name
          elements = (conf.respond_to?(:elements) ? conf.elements : []).select{ |e| e.name == subproxy.name.to_s || e.name == subproxy.alias.to_s }
          if elements.empty? && subproxy.init?
            if subproxy.argument && !subproxy.defaults.has_key?(subproxy.argument.first)
              raise ArgumentError, "#{name}: init is specified, but default value of argument is missing"
            end
            missing_keys = subproxy.params.keys.select{|param_name| !subproxy.defaults.has_key?(param_name)}

View on GitHub (pinned to dd45c6e18d)

When it happens

Trigger: Thrown at lib/fluent/config/section.rb:204 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/576080757972069a. Report an issue: GitHub.