class Puma::Server

def handle_servers
  begin
    check = @check
    sockets = [check] + @binder.ios
    pool = @thread_pool
    queue_requests = @queue_requests
    drain = @options[:drain_on_shutdown] ? 0 : nil
    addr_send_name, addr_value = case @options[:remote_address]
    when :value
      [:peerip=, @options[:remote_address_value]]
    when :header
      [:remote_addr_header=, @options[:remote_address_header]]
    when :proxy_protocol
      [:expect_proxy_proto=, @options[:remote_address_proxy_protocol]]
    else
      [nil, nil]
    end
    while @status == :run || (drain && shutting_down?)
      begin
        ios = IO.select sockets, nil, nil, (shutting_down? ? 0 : @idle_timeout)
        unless ios
          unless shutting_down?
            @idle_timeout_reached = true
            if @clustered
              @worker_write << "i#{Process.pid}\n" rescue nil
              next
            else
              @log_writer.log "- Idle timeout reached"
              @status = :stop
            end
          end
          break
        end
        if @idle_timeout_reached && @clustered
          @idle_timeout_reached = false
          @worker_write << "i#{Process.pid}\n" rescue nil
        end
        ios.first.each do |sock|
          if sock == check
            break if handle_check
          else
            pool.wait_until_not_full
            pool.wait_for_less_busy_worker(@options[:wait_for_less_busy_worker])
            io = begin
              sock.accept_nonblock
            rescue IO::WaitReadable
              next
            end
            drain += 1 if shutting_down?
            pool << Client.new(io, @binder.env(sock)).tap { |c|
              c.listener = sock
              c.http_content_length_limit = @http_content_length_limit
              c.send(addr_send_name, addr_value) if addr_value
            }
          end
        end
      rescue IOError, Errno::EBADF
        # In the case that any of the sockets are unexpectedly close.
        raise
      rescue StandardError => e
        @log_writer.unknown_error e, nil, "Listen loop"
      end
    end
    @log_writer.debug "Drained #{drain} additional connections." if drain
    @events.fire :state, @status
    if queue_requests
      @queue_requests = false
      @reactor.shutdown
    end
    graceful_shutdown if @status == :stop || @status == :restart
  rescue Exception => e
    @log_writer.unknown_error e, nil, "Exception handling servers"
  ensure
    # Errno::EBADF is infrequently raised
    [@check, @notify].each do |io|
      begin
        io.close unless io.closed?
      rescue Errno::EBADF
      end
    end
    @notify = nil
    @check = nil
  end
  @events.fire :state, :done
end