NodeJs Error: Port already in use:3000 using socket.io and express-CodePudding

I'm making a node.js application that uses socket.io and express.

The code looks like this-

const express=require('express');
const app=express();
const http=require('http').Server(app);
app.use(express.static('public'));

const io=require('socket.io')(http,{
  cors:{origin:'*'}
});

http.listen(3000,()=>{
  console.log('listening to port 3000');
});

//when connection made 
io.on('connection',(socket)=>{
  console.log('connection made!');
});

Here,public is a folder container all the html files for the website.

Now,when I run it locally on my pc,it works fine But when I deployed it on the glitch.com servers,i get this error:

Error: listen EADDREINUSE: address already in use :::3000

As far as i know,3000 is the only available port in glitch and I cannot use another port.

Also,the questions on stack overflow related to this topic doesn't help me since most of the answers are related to killing the running tasks themselves and I don't have permission to do so on the server.

CodePudding user response：

This often happens when your server is still running in error, try switching listening to 3001 and see if there is still the error

CodePudding user response：

free your 3000 port:

Linux: fuser -k 3000/tcp