code: @Override
    public boolean start()
    {
      if (! _lifecycle.toStarting()) {
        return false;
      }
  
      log.isLoggable(Level.FINER);
  
      String name = "resin-nio-select-manager-" + _gId++;
      _thread = new Thread(this, name);
      _thread.setDaemon(true);
  
      _thread.start();
  
      _lifecycle.waitForActive(2000);
  
      if (log.isLoggable(Level.FINER))
        log.finer(this + " active");
  
      log.fine("Non-blocking keepalive enabled with max sockets = "
               + _selectMax);
  
      return true;
    }
docs: Starts the manager.