Method: Fluent::Plugin::Output#enqueue_thread_run

Defined in:

lib/fluent/plugin/output.rb

#enqueue_thread_run ⇒ Object

# File 'lib/fluent/plugin/output.rb', line 1445

def enqueue_thread_run
  value_for_interval = nil
  if @flush_mode == :interval
    value_for_interval = @buffer_config.flush_interval
  end
  if @chunk_key_time
    if !value_for_interval || @buffer_config.timekey < value_for_interval
      value_for_interval = [@buffer_config.timekey, @buffer_config.timekey_wait].min
    end
  end
  unless value_for_interval
    raise "BUG: both of flush_interval and timekey are disabled"
  end
  interval = value_for_interval / 11.0
  if interval < @buffer_config.flush_thread_interval
    interval = @buffer_config.flush_thread_interval
  end

  while !self.after_started? && !self.stopped?
    sleep 0.5
  end
  log.debug "enqueue_thread actually running"

  begin
    while @output_enqueue_thread_running
      now_int = Time.now.to_i
      if @output_flush_interrupted
        sleep interval
        next
      end

      @output_enqueue_thread_mutex.lock
      begin
        if @flush_mode == :interval
          flush_interval = @buffer_config.flush_interval.to_i
          # This block should be done by integer values.
          # If both of flush_interval & flush_thread_interval are 1s, expected actual flush timing is 1.5s.
          # If we use integered values for this comparison, expected actual flush timing is 1.0s.
          @buffer.enqueue_all{ |metadata, chunk| chunk.raw_create_at + flush_interval <= now_int }
        end

        if @chunk_key_time
          timekey_unit = @buffer_config.timekey
          timekey_wait = @buffer_config.timekey_wait
          current_timekey = now_int - now_int % timekey_unit
          @buffer.enqueue_all{ |metadata, chunk| metadata.timekey < current_timekey && metadata.timekey + timekey_unit + timekey_wait <= now_int }
        end
      rescue => e
        raise if @under_plugin_development
        log.error "unexpected error while checking flushed chunks. ignored.", error: e
        log.error_backtrace
      ensure
        @output_enqueue_thread_waiting = false
        @output_enqueue_thread_mutex.unlock
      end
      sleep interval
    end
  rescue => e
    # normal errors are rescued by inner begin-rescue clause.
    log.error "error on enqueue thread", error: e
    log.error_backtrace
    raise
  end
end