事件：'error'

¥Event: 'error'

• err <Error> 错误。

  ¥err <Error> The error.

'error' 事件在以下情况下触发：

¥The 'error' event is emitted whenever:

• 无法生成该进程。

  ¥The process could not be spawned.

• 无法终止进程。

  ¥The process could not be killed.

• 向子进程发送消息失败。

  ¥Sending a message to the child process failed.

• 子进程已通过 signal 选项中止。

  ¥The child process was aborted via the signal option.

发生错误后，'exit' 事件可能会触发，也可能不会触发。同时监听 'exit' 和 'error' 事件时，防止意外调用处理程序函数多次。

¥The 'exit' event may or may not fire after an error has occurred. When listening to both the 'exit' and 'error' events, guard against accidentally invoking handler functions multiple times.

另见 subprocess.kill() 和 subprocess.send()。

¥See also subprocess.kill() and subprocess.send().