Propagating errors back to a client is done by throwing exceptions 將錯誤傳播回客戶端是通過引發(fā)異常來完成的。
The rule for propagating errors is : if the process which receives an exit signal , caused by an error , is not trapping exits then the process dies and sends exit signals to all its linked processes 傳播錯誤的規(guī)則是:如果一個進程接收到退出信號(可能是由于一個錯誤引起的) ,而沒有加以捕獲,這個進程失效并且發(fā)送退出信號給和它相鏈接的其他進程。