Question

因此，我有一个简单的快递服务器，它通过猫鼬连接到mongoDB地图集。例如，我启动服务器，一切正常，但是当我重新启动时（无论使用nodemon还是仅使用node），我都会收到错误消息：

Error: listen EADDRINUSE: address already in use :::5000
    at Server.setupListenHandle [as _listen2] (net.js:1313:16)
    at listenInCluster (net.js:1361:12)
    at Server.listen (net.js:1447:7)
    at Function.listen (C:\Users\Олег\e-commerce-mern\MERN-shop-app\node_modules\express\lib\application.js:618:24)
    at Object.<anonymous> (C:\Users\Олег\e-commerce-mern\MERN-shop-app\backend\server.js:36:20)
    at Module._compile (internal/modules/cjs/loader.js:1138:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)
    at Module.load (internal/modules/cjs/loader.js:986:32)
    at Function.Module._load (internal/modules/cjs/loader.js:879:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
    at internal/main/run_main_module.js:17:47
Emitted 'error' event on Server instance at:
    at emitErrorNT (net.js:1340:8)
    at processTicksAndRejections (internal/process/task_queues.js:84:21) {
  code: 'EADDRINUSE',
  errno: 'EADDRINUSE',
  syscall: 'listen',
  address: '::',
  port: 5000
}

，然后重新启动一次或几次后，我的服务器就可以正常运行而没有出现错误，但是，再次保存之后，问题又重复了，我也不知道为什么。 db.js：

const mongoose = require('mongoose');

const mongoConnection = () => {
  return mongoose.connect(process.env.MONGO_URI, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useUnifiedTopology: true,
  });
};

module.exports = mongoConnection;

server.js：

const express = require('express');
const products = require('./data/products'); //my mock data
const dotenv = require('dotenv');
// eslint-disable-next-line no-unused-vars
const colors = require('colors');
const dbConnect = require('./config/db');

dotenv.config();
dbConnect()
    .then(() => {
      // callback();
      console.log('db connected');
    })
    .catch((err) => {
      console.error(`Error: ${error.message}`.red.underline.bold);
      process.exit(1);
    });

const app = express();

app.get('/', (req, res) => {
  res.send('app is running');
});

app.get('/api/products', (req, res) => {
  res.json(products);
});

app.get('/api/products/:id', (req, res) => {
  const product = products.find((p) => p._id === req.params.id);
  res.json(product);
});

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

const server = app.listen(PORT,
    // eslint-disable-next-line max-len
    console.log(`server running in ${process.env.NODE_ENV} on port ${PORT}`.yellow.bold));

process.on('unhandledRejection', (err) => {
  console.log('err', err.name, err.message);
  console.log('unhadled rejection');
  server.close(() => {
    process.exit(1);
  });
});

如您所见，这里没有什么特别的，是的，我了解我的端口在重启时不会被杀死，但我不了解这种行为以及如何防止这种行为。 附言我正在使用Windows。

重新启动服务器时出现错误监听EADDRINUSE：地址已在使用::: 5000

0 个答案: