Question

我需要从主节点应用程序派生/派生进程。此过程应“无休止地”运行，因为它们检查文件系统中不同文件夹中的更改并处理新文件。

我通过以下方式分叉进程：

var processes = [];
var fork = require('child_process').fork;

var processList = [
    {'servicename':'faxservice1'}, 
    {'servicename':'faxservice2'},
    {'servicename':'faxservice3'}
];

timeOutValue = 10000;

processList.forEach(Service => {

    var cp = fork(['./modules/services/inbound/fax/service.js']);


    cp.on('close', function() {
        console.log('child process has ended');
        process.exit();
    })

    cp.on('message', (m) => {
        console.log(`SVC | ${m}`);
    });

    setTimeout(function() {
        cp.send('stop');
    }, timeOutValue);    

    // Push spawned process to process-array
    processes.push(cp);

    timeOutValue = timeOutValue + 5000;
});

子进程执行以下操作：

const svcName = 'FAX-INBOUND';

var chokidar = require('chokidar');
var watcher = chokidar.watch('file, dir, or glob', {
    ignored: /[\/\\]\./, persistent: true
  });

var log = console.log.bind(console);

var args = process.argv.slice(2);
console.log(`${svcName} | ${args} | starting`);

process.on('message', (m) => {
    console.log(`${svcName} | ${m} | Service termination command recieved from host`);
    process.exit();
});




watcher
      .on('add', function(path) { log(svcName + " | " + 'File', path, 'has been added'); })
      .on('addDir', function(path) { log(svcName + " | " + 'Directory', path, 'has been added'); })
      .on('change', function(path) { log(svcName + " | " + 'File', path, 'has been changed'); })
      .on('unlink', function(path) { log(svcName + " | " + 'File', path, 'has been removed'); })
      .on('unlinkDir', function(path) { log(svcName + " | " + 'Directory', path, 'has been removed'); })
      .on('error', function(error) { log(svcName + " | " + 'Error happened', error); })
      .on('ready', function() { log(svcName + " | " + 'Initial scan complete. Ready for changes.'); })
      .on('raw', function(event, path, details) { log(svcName + " | " + 'Raw event info:', event, path, details); })

如果我运行显示的代码，我会在日志中看到三个进程分叉了：

FAX-INBOUND |  | starting
FAX-INBOUND |  | starting
FAX-INBOUND | Initial scan complete. Ready for changes.
FAX-INBOUND | Initial scan complete. Ready for changes.
FAX-INBOUND |  | starting
FAX-INBOUND | Initial scan complete. Ready for changes.

setTimeout 仅用于调试目的，并且应将消息分别发送到三个分叉的进程，每个进程有5秒的延迟。产生的进程重新审视消息后，它们应该退出。

BUT 在控制台上，我仅看到一个分叉过程的控制台输出：

FAX-INBOUND | stop | Service termination command recieved from host

如果一个分叉的流程调用

process.exit()

所有分叉的进程都被杀死了吗？

我在做什么错了？

致谢

Answer 1

在“ cp.on（'close'，...）”中，孩子死后立即退出父进程。反过来，这将杀死所有未使用option.detached=true

进行分叉的进程

nodejs-如果一个进程调用退出，则分叉的进程被杀死？

1 个答案: