事件：'message'

🌐 Event: 'message'

• worker <cluster.Worker>
• message <Object>
• handle <undefined> | <Object>

当集群主进程接收到来自任何工作进程的消息时触发。

🌐 Emitted when the cluster primary receives a message from any worker.

见child_process 事件：'message'。

🌐 See child_process event: 'message'.