Node.js Server with Socket.io Not Broadcasting Messages to All Clients Consistently
This might be a silly question, but I'm working with an scenario where my Node.js server using Socket.io intermittently fails to broadcast messages to all connected clients. I have a simple setup where clients connect to the server, and whenever one of them sends a message, it should be broadcasted to everyone. Occasionally, some clients do not receive the message. I suspect it might be related to how I handle client connections or the broadcasting mechanism itself. Here’s a simplified version of my server code: ```javascript const express = require('express'); const http = require('http'); const socketIo = require('socket.io'); const app = express(); const server = http.createServer(app); const io = socketIo(server); io.on('connection', (socket) => { console.log('A user connected: ' + socket.id); socket.on('chat message', (msg) => { console.log('Message received: ' + msg); io.emit('chat message', msg); // Broadcasting the message }); socket.on('disconnect', () => { console.log('User disconnected: ' + socket.id); }); }); server.listen(3000, () => { console.log('Server is running on http://localhost:3000'); }); ``` On the client side, I have a straightforward implementation: ```javascript const socket = io(); document.getElementById('form').addEventListener('submit', function(e) { e.preventDefault(); // Prevent form submission socket.emit('chat message', document.getElementById('input').value); document.getElementById('input').value = ' ''; // Clear input }); socket.on('chat message', function(msg) { const item = document.createElement('li'); item.textContent = msg; document.getElementById('messages').appendChild(item); }); ``` I’m using Socket.io version 4.0.0 on the server and the client. I’ve tried to debug the scenario by checking the connection status of clients and ensuring they are still connected when messages are sent. The question seems to arise especially when there are a lot of clients connected (10+). I also noticed that some clients sometimes receive messages with a slight delay, while others do not receive them at all. Is there something specific in my setup that might be causing this inconsistency? Any insights on how to ensure reliable message broadcasting would be greatly appreciated! For context: I'm using Javascript on Linux. What's the best practice here?