事件：'fork'

【Event: 'fork'】

• worker <cluster.Worker>

当一个新的工作进程被分叉时，集群模块会触发 'fork' 事件。这可以用来记录工作进程的活动，并创建自定义超时。

【When a new worker is forked the cluster module will emit a 'fork' event. This can be used to log worker activity, and create a custom timeout.】

const timeouts = [];
function errorMsg() {
  console.error('Something must be wrong with the connection ...');
}

cluster.on('fork', (worker) => {
  timeouts[worker.id] = setTimeout(errorMsg, 2000);
});
cluster.on('listening', (worker, address) => {
  clearTimeout(timeouts[worker.id]);
});
cluster.on('exit', (worker, code, signal) => {
  clearTimeout(timeouts[worker.id]);
  errorMsg();
}); 拷贝