javascript - Nodemon:错误:监听 EADDRINUSE:地址已在使用中:::5000

Question

我正在创建一个项目并使用nodejs，express作为后端。一切正常，但当我在文件中进行任何更改时，nodemon 由于以下错误而无法重新启动服务器:

错误:监听 EADDRINUSE:地址已在使用中:::5000

index.js:

const express = require("express");
const morgan = require("morgan");
const mongoose = require("mongoose");
const cookieParser = require("cookie-parser");
const session = require("express-session");
const FileStore = require("session-file-store")(session);
const dotenv = require("dotenv");
var passport = require("passport");

dotenv.config();

const PORT = process.env.PORT || 5000;

const app = express();

.....

app.listen(PORT, () => console.log(`Server listening on port ${PORT}!`));

package.json

{
  "name": "chat-app-backend",
  "version": "0.0.0",
  "private": true,
  "scripts": {
    "start": "node index.js",
    "dev": "nodemon --ignore 'sessions/' index.js"
  },
  "dependencies": {
    "bcryptjs": "^2.4.3",
    "cookie-parser": "^1.4.5",
    "cors": "^2.8.5",
    "debug": "~2.6.9",
    "dotenv": "^8.2.0",
    "express": "~4.16.0",
    "express-session": "^1.17.0",
    "http-errors": "~1.6.2",
    "jade": "~1.11.0",
    "jsonwebtoken": "^8.5.1",
    "mongoose": "^5.9.4",
    "morgan": "~1.9.0",
    "passport": "^0.4.1",
    "passport-jwt": "^4.0.0",
    "passport-local": "^1.0.0",
    "passport-local-mongoose": "^6.0.1",
    "session-file-store": "^1.4.0",
    "uuid": "^7.0.2"
  },
  "devDependencies": {
    "nodemon": "^2.0.2"
  }
}

我每次都必须从终端显式终止服务器，这不是最佳解决方案。我尝试了几件事，但没有一个起作用。甚至在nodemon GitHub问题页面中发现了一些问题，但我也找不到任何东西。

我还添加了 lsof -i:5000 的输出，即使服务器我正在关闭服务器 - *node 31625 rishav 20u IPv6 5300049 0t0 TCP: 5000(听)

Answer 1

--delay 帮助我解决了这两个问题

• 自动重启

• 使用 ctrl-c 停止

  nodemon --delay 500ms app.js
  

我还补充道:

process.once('SIGUSR2', function () {
  process.kill(process.pid, 'SIGUSR2');
});

process.on('SIGINT', function () {
  // this is only called on ctrl+c, not restart
  process.kill(process.pid, 'SIGINT');
});