fluent/fluentd · error · ArgumentError

BUG: TLS transport specified, but certification options are

Error message

BUG: TLS transport specified, but certification options are not specified

What it means

Error "BUG: TLS transport specified, but certification options are not specified" thrown in fluent/fluentd.

Source

Thrown at lib/fluent/plugin_helper/server.rb:101

        if proto == :tcp || proto == :tls
          socket_options[:linger_timeout] ||= @transport_config&.linger_timeout || 0
        end

        socket_options[:receive_buffer_size] ||= @transport_config&.receive_buffer_size

        socket_option_validate!(proto, **socket_options)
        socket_option_setter = ->(sock){ socket_option_set(sock, **socket_options) }

        case proto
        when :tcp
          server = server_create_for_tcp_connection(shared, bind, port, backlog, socket_option_setter, &block)
        when :tls
          transport_config = if tls_options
                               server_create_transport_section_object(tls_options)
                             elsif @transport_config && @transport_config.protocol == :tls
                               @transport_config
                             else
                               raise ArgumentError, "BUG: TLS transport specified, but certification options are not specified"
                             end
          server = server_create_for_tls_connection(shared, bind, port, transport_config, backlog, socket_option_setter, &block)
        when :unix
          raise "not implemented yet"
        else
          raise "unknown protocol #{proto}"
        end

        server_attach(title, proto, port, bind, shared, server)
      end

      # server_create(:title, @port) do |data|
      #   # ...
      # end
      # server_create(:title, @port) do |data, conn|
      #   # ...
      # end
      # server_create(:title, @port, proto: :udp, max_bytes: 2048) do |data, sock|

View on GitHub (pinned to dd45c6e18d)

When it happens

Trigger: Thrown at lib/fluent/plugin_helper/server.rb:101 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

AI-assisted analysis of fluent/fluentd@dd45c6e18d (2026-08-21). Data as JSON: /api/errors/4eb98921e5b07be9. Report an issue: GitHub.