Erlang消息不存在PID

本文介绍了Erlang消息不存在PID的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

Erlang运行时对发送到不存在进程的消息做什么？例如，一个进程被产生，然后在它终止另一个进程后再发送一个消息。

What does the Erlang runtime do with a message sent to a non-existent process? For example, a process is spawned, and then later after it terminates another process sends a message to it.

推荐答案

消息是下降。根据文档：

如果接收方已经终止，信号将不会到达...

If the receiver has terminated, the signal will not arrive...

另请参阅 rvirding的这个答案，谁可能知道他在说什么：

Also see this answer from rvirding, who probably knows what he's talking about:

向pid发送一条消息，指的是一个死的进程是完全合法的（消息刚刚消失）...

While sending a message to a pid which refers to a dead process is perfectly legal (the message just disappears)...