NodeJs如何在主进程和子进程之间共享socket.io？

Question

假设风箱是我的app.js

var app = express();
let server = require("http").Server(app);

let io = require("socket.io").listen(server);
require("./forked-background-process")(io);

然后是forked-background-process，它创建了一个分叉的过程

let schedule = require("node-schedule");
   module.exports = io => {
     schedule.scheduleJob("40 9 11 * * *", async function() {
     const jobAlertForkedProcess = fork('./startup/schedule-jobs');
     await jobAlertForkedProcess.send(2, io);
       jobAlertForkedProcess.on('message', (sum) => {
       jobAlertForkedProcess.kill();
     });
  });
}

这是我分叉的流程内容startup/schedule-jobs：

process.on('message', async (type, io) => {

});

但这会导致以下错误This handle type cannot be sent at ChildProcess.target._send