code: private void throwQException(final QConnectorException e) {
  		this.executor.execute(new Runnable() {
  			
  			@Override
  			public void run() {
  				QConnectorAsyncImpl.this.listener.exception(e);
  			}
  		});
  	}
docs: Throw an exception if something happened, that the system can not fix.
  
  @param e Exception