命令失败：在 Express 应用程序中更新 npm 后的 wmic 进程

Question

在我的 app.js,

const app = require("express")();

const port = 3000;

app.get("/", (req, res) => {
  res.send("hello world");
});

app.listen(port, () => {
  console.log("server running!");
});

这个错误是在我保存/更新 app.js 文件后产生的，

(node:4196) UnhandledPromiseRejectionWarning: Error: Command failed: wmic process where (ParentProcessId=5740) get ProcessId 2> nul
    at checkExecSyncError (child_process.js:630:11)
    at execSync (child_process.js:666:15)
    at kill (C:\Users\SANTOSH\Desktop\nodesql\node_modules\nodemon\lib\monitor\run.js:337:26)
    at Function.run.kill (C:\Users\SANTOSH\Desktop\nodesql\node_modules\nodemon\lib\monitor\run.js:425:7)
    at Bus.<anonymous> (C:\Users\SANTOSH\Desktop\nodesql\node_modules\nodemon\lib\monitor\run.js:495:7)
    at Bus.emit (events.js:327:22)
    at restartBus (C:\Users\SANTOSH\Desktop\nodesql\node_modules\nodemon\lib\monitor\watch.js:228:7)
    at FSWatcher.filterAndRestart (C:\Users\SANTOSH\Desktop\nodesql\node_modules\nodemon\lib\monitor\watch.js:212:16)
    at FSWatcher.emit (events.js:315:20)
    at FSWatcher.emitWithAll (C:\Users\SANTOSH\Desktop\nodesql\node_modules\chokidar\index.js:540:8)
(node:4196) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)

Package.json 文件,

{
  "name": "nodesql",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "scripts": {
    "start": "nodemon app.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.19.0",
    "express": "^4.17.1",
    "mysql2": "^2.2.5",
    "sequelize": "^6.6.4",
    "sequelize-cli": "^6.2.0"
  },
  "devDependencies": {
    "nodemon": "^2.0.9"
  }
}

今天我将我的 npm 更新到 7.19.1，之后我收到了这个错误。否则，它必须与 nodemon 做一些事情。

Answer 1

你检查nodemon -v，如果不能识别nodemon那么npm install -g nodemon -> nodemon app.js

[在此处输入图片描述][1] [1]: https://i.stack.imgur.com/UbQLM.png

Answer 2

尝试全局安装 nodemon 版本 2.0.7

首先安装当前版本npm uninstall -g nodemon 然后写命令 npm i -g nodemon@2.0.7

至少对我有用:)

Answer 3

未找到 system32 文件夹的路径。一旦我将它添加到系统路径，它就会工作，因为它 should.The 问题不在于 nodemon，而是我的系统在环境变量中缺少 system32 文件夹的路径。 System32 文件夹包含 Windows 正常运行所需的重要操作系统文件。对于这种情况，命令不会自动刷新 (nodemon)。

Answer 4

将您的 nodemon 更新到最新版本将解决此问题。

npm install nodemon

运行以上命令会将 nodemon 更新到最新版本。

Answer 5

可能是新版本的 nodemon 导致的。因此，我已将版本降级为 2.0.7，这对我来说工作正常！

npm uninstall nodemon
npm install nodemon@2.0.7 --save-dev

Answer 6

如果没有解决，您可以卸载 nodemone 并重新安装，这对我有用。

命令失败：在 Express 应用程序中更新 npm 后的 wmic 进程

Command failed: wmic process after updating npm in Express app

node.js

npm

express

nodemon