事件：'exit'

¥Event: 'exit'

• worker <cluster.Worker>

• code <number> 如果其正常退出，则为退出码。

  ¥code <number> The exit code, if it exited normally.

• signal <string> 造成进程被终止的信号的名称（例如 'SIGHUP'）。

  ¥signal <string> The name of the signal (e.g. 'SIGHUP') that caused the process to be killed.

当任何工作进程死亡时，则集群模块将触发 'exit' 事件。

¥When any of the workers die the cluster module will emit the 'exit' event.

这可用于通过再次调用 .fork() 来重新启动工作进程。

¥This can be used to restart the worker by calling .fork() again.

cluster.on('exit', (worker, code, signal) => {
  console.log('worker %d died (%s). restarting...',
              worker.process.pid, signal || code);
  cluster.fork();
}); 拷贝

参见 child_process 事件：'exit'。

¥See child_process event: 'exit'.