एक्सप्रेस जेएस: पोर्ट चल रहा है लेकिन पोर्ट को मारने में सक्षम नहीं है

जब मैं nodemonindex.js चलाने की कोशिश करता हूं तो मुझे यह त्रुटि मिलती है मेरे पास pm2 चल रहा है लेकिन मेरा लोकलहोस्ट / 5002 देता है

[nodemon] starting `node index.js`
Listening on 5002
events.js:377
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE: address already in use :::5002
    at Server.setupListenHandle [as _listen2] (net.js:1331:16)
    at listenInCluster (net.js:1379:12)
    at Server.listen (net.js:1465:7)
    at Function.listen (/home/vivek/mycodes/ask-backend/node_modules/express/lib/application.js:618:24)
    at Object.<anonymous> (/home/vivek/mycodes/ask-backend/index.js:19:5)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:12)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:76:12)
Emitted 'error' event on Server instance at:
    at emitErrorNT (net.js:1358:8)
    at processTicksAndRejections (internal/process/task_queues.js:82:21) {
  code: 'EADDRINUSE',
  errno: -98,
  syscall: 'listen',
  address: '::',
  port: 5002
}
[nodemon] app crashed - waiting for file changes before starting...

मैंने कोशिश की pm2 kill killall node अभी भी पोर्ट मरता नहीं है, जब मैंने जीथब से अपना कोड खींचा और एक नई मशीन पर चल रहा था, तो मुझे नहीं पता कि डीबी इस त्रुटि के लिए रेजोन है या नहीं

Index.js

var moment = require("moment");
var express = require("express");
var ObjectId = require("mongodb").ObjectID;
const { ExploreTrendRequest } = require("g-trends");
var bodyParser = require("body-parser");
var app = express();

// if (process.env.NODE_ENV == "production") {
//   app.use(express.static("portfolio/build"));
//   const path = require("path");
//   app.get("*", (req, res) => {
//     res.sendFile(path.resolve(__dirname, "portfolio", "build", "index.html"));
//   });
// }
const PORT = process.env.PORT || 5002;

express().listen(PORT, () => console.log(`Listening on ${PORT}`));

app.listen(process.env.PORT || 5002);
const multer = require("multer");
const upload = multer();
var bodyParser = require("body-parser");

app.use(express.json());
var MongoClient = require("mongodb").MongoClient;
var id = require("mongodb").ObjectID;

//Create a database named "mydb":    sudo service mongod start
var url = "mongodb://localhost:27017/";

MongoClient.connect(url, { useUnifiedTopology: true }, function (err, db) {
  if (err) throw err;

  var mydb = db.db(mydb);
  var created = moment().format("YYYY-MM-DD hh:mm:ss");

  // mydb.createCollection("questions", function (err, data) {
  // if (err) throw err;
  // var question = {
  //   question: "the first question",
  //   time: created,
  // };
  // mydb.collection("questions").insertOne(question, function (err, data) {
  //   if (err) throw err;
  //   console.log("Data created!");

  app.use(function (req, res, next) {
    // Website you wish to allow to connect
    res.setHeader("Access-Control-Allow-Origin", "http://localhost:3000");

    // Request methods you wish to allow
    res.setHeader(
      "Access-Control-Allow-Methods",
      "GET, POST, OPTIONS, PUT, PATCH, DELETE"
    );

    // Request headers you wish to allow
    res.setHeader(
      "Access-Control-Allow-Headers",
      "X-Requested-With,content-type"
    );

    // Set to true if you need the website to include cookies in the requests sent
    // to the API (e.g. in case you use sessions)
    res.setHeader("Access-Control-Allow-Credentials", true);

    // Pass to next layer of middleware
    next();
  });
  app.use(express.urlencoded({ extended: true }));
  app.post("/questionpost", function (req, res) {
    let formData = req.body;
    // let bodyJson = JSON.parse(formData);
    console.log(formData);

    mydb.collection("questions").insertOne(formData, (err, result) => {
      if (err) {
        res.send({ error: "Ann error has occured" });
      } else {
        res.send(result.ops[0]);
      }
    });
  });

  app.post("/answerpost", function (req, res) {
    let formData = req.body;
    // let bodyJson = JSON.parse(formData);
    // console.log(formData);

    mydb.collection("answers").insertOne(formData, (err, result) => {
      if (err) {
        res.send({ error: "Ann error has occured" });
      } else {
        res.send(result.ops[0]);
      }
    });
  });

  app.get("/answersapi/:gotid", function (req, res) {
    let id = req.params.gotid;
    console.log(id);
    mydb
      .collection("answers")
      .find({ question_id: id })
      .toArray(function (err, data) {
        if (err) throw error;
        res.send(data);
      });
  });

  // mydb
  //   .collection("questions")
  //   .insertOne(formData)
  //   .toArray(function (err, res) {
  //     if (err) throw err;
  //     console.log("1 document inserted");
  //   });
  // res.send(res);

  // app.post("/questionpost", jsonParser, function (req, res) {
  //   let data = req;
  //   console.log(data);
  // });

  app.get("/questapi", function (req, res) {
    console.log("apicalled");

    mydb
      .collection("questions")
      .find({})
      .toArray(function (err, data) {
        if (err) throw error;
        res.send(data);
      });
  });

  //http://localhost:5002/answerpost
  // increment;

  app.post("/increment", function (req, res) {
    let id = req.body;
    var correctcount = id.correctcount + 1;
    //var ansid = id.Answer_id;
    var realid = ObjectId(id.Answer_id);
    console.log(correctcount);

    // var myquery = { address: "Valley 345" };
    // var newvalues = { $set: { name: "Mickey", address: "Canyon 123" } };
    // dbo
    //   .collection("customers")
    //   .updateOne(myquery, newvalues, function (err, res) {
    //     if (err) throw err;
    //     console.log("1 document updated");
    //     db.close();
    //   });

    mydb
      .collection("answers")
      .updateOne(
        { _id: realid },
        { $set: { correctcount: correctcount } },
        function (err, data) {
          if (err) throw err;
          console.log("1 document updated");
          res.send(data);
        }
      );
  });

  app.post("/decrementer", function (req, res) {
    let id = req.body;
    var wrongcount = id.wrongcount - 1;
    //var ansid = id.Answer_id;
    var realid = ObjectId(id.Answer_id);
    console.log(wrongcount);

    // var myquery = { address: "Valley 345" };
    // var newvalues = { $set: { name: "Mickey", address: "Canyon 123" } };
    // dbo
    //   .collection("customers")
    //   .updateOne(myquery, newvalues, function (err, res) {
    //     if (err) throw err;
    //     console.log("1 document updated");
    //     db.close();
    //   });

    mydb
      .collection("answers")
      .updateOne(
        { _id: realid },
        { $set: { wrongcount: wrongcount } },
        function (err, data) {
          if (err) throw err;
          console.log("1 document updated");
          res.send(data);
        }
      );
  });

  app.get("/questone/:gotid", function (req, res) {
    let id = req.params.gotid;
    // /console.log(id);
    mydb
      .collection("questions")
      .find({ _id: ObjectId(id) })
      .toArray(function (err, data) {
        if (err) throw error;
        //console.log(data);
        res.send(data);
      });
  });

  //trend api call

  app.post("/trend", function () {
    const explorer = new ExploreTrendRequest();
    console.log("api calling 1");
    explorer
      .addKeyword("Dream about snakes")
      .compare("Dream about falling")
      .download()
      .then((csv) => {
        console.log(
          "[✔] Done, take a look at your beautiful CSV formatted data!"
        );
        console.log(csv);
      })
      .catch((error) => {
        console.log("[!] Failed fetching csv data due to an error", error);
      });
  });
});

मैंने अपना index.js यहां पोस्ट किया है ताकि आप यह बता सकें कि त्रुटि क्या है