fluent/fluentd · error · ConfigError

'#{name}' parameter is required but nil is specified

Error message

'#{name}' parameter is required but nil is specified

What it means

Error "'#{name}' parameter is required but nil is specified" thrown in fluent/fluentd.

Source

Thrown at lib/fluent/config/section.rb:189

            if val == :default
              # default value is already set if it exists
              unless section_params.has_key?(varname)
                logger.error "config error in:\n#{conf}" if logger
                raise ConfigError, "'#{varname}' doesn't have default value"
              end
            else
              begin
                section_params[varname] = self.instance_exec(val, opts, name, &block)
              rescue ConfigError => e
                logger.error "config error in:\n#{conf}" if logger
                raise e
              end
            end

            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)

View on GitHub (pinned to dd45c6e18d)

When it happens

Trigger: Thrown at lib/fluent/config/section.rb:189 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/d4a3c4e75116edc8. Report an issue: GitHub.