Replit
realtime
Replit WebSocket Proxy Disconnecting
Your real-time features (chat, live updates, notifications) stop working after a few minutes because WebSocket connections are silently dropped. Users see stale data and must refresh the page to get updates again.
Replit routes WebSocket traffic through a reverse proxy that has idle connection timeouts. If no data is sent over the WebSocket for a period of time, the proxy closes the connection. Your app has no reconnection logic, so the connection stays dead until the user refreshes.
This is especially problematic for apps that use WebSockets for occasional updates (like notifications) rather than constant data streams. The connection sits idle between updates and gets killed by the proxy.
Error Messages You Might See
WebSocket connection to 'wss://...' failed
WebSocket is already in CLOSING or CLOSED state
Error during WebSocket handshake: Unexpected response code: 502
Connection closed abnormally (code 1006)
Common Causes
- Proxy idle timeout — Replit's reverse proxy closes WebSocket connections that are idle for too long (typically 60 seconds)
- No ping/pong heartbeat — the app does not send periodic keep-alive messages to prevent timeout
- No reconnection logic — when the connection drops, the client does not attempt to reconnect
- Container sleep — Replit free tier containers sleep after inactivity, killing all connections
- SSL/TLS handshake issues — WebSocket upgrade fails intermittently through the HTTPS proxy
How to Fix It
- Implement ping/pong heartbeat — send a ping message every 30 seconds from the server and respond with pong from the client
- Add client-side reconnection — detect disconnection and automatically reconnect with exponential backoff
- Use a WebSocket library with built-in reconnection — libraries like socket.io or reconnecting-websocket handle this automatically
- Handle connection state in UI — show a "reconnecting" indicator when the WebSocket is disconnected
- Use wss:// not ws:// — Replit requires secure WebSocket connections since it serves over HTTPS
Real developers can help you.
rayush33
JavaScript (React.js, React Native, Node.js) Developer with demonstrated industry experience of 4+ years, actively looking for opportunities to hone my skills as well as help small-scale business owners with solutions to technical problems
Jaime Orts-Caroff
I'm a Senior Android developer, open to work in various fields
Antriksh Narang
5 years+ Experienced Dev (Specially in Web Development), can help in python, javascript, react, next.js and full stack web dev technologies.
MFox
Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking.
Vlad Temian
15+ years shipping production infrastructure for startups. Former CTO at qed.builders (acquired by The Sandbox).
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Matthew Butler
Systems Development Engineer @ Amazon Web Services
Caio Rodrigues
I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations.
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David Olverson
Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production.
Mehdi Ben Haddou
- Founder of Chessigma (1M+ users) & many small projects
- ex Founding Engineer @Uplane (YC F25)
- ex Software Engineer @Amazon and @Booking.com
Basel Issmail
’m a Senior Full-Stack Developer and Tech Lead with experience designing and building scalable web platforms. I work across the full development lifecycle, from translating business requirements into technical architecture to delivering reliable production systems.
My work focuses on modern web technologies, including TypeScript, Angular, Node.js, and cloud-based architectures. I enjoy solving complex technical problems and helping teams turn product ideas and prototypes into working platforms that can grow and scale.
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You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How often should I send heartbeat pings?
Every 25-30 seconds is a safe interval. This keeps the connection alive through most proxy timeout configurations without creating excessive traffic.
Should I use WebSocket or socket.io on Replit?
socket.io is recommended because it includes automatic reconnection, heartbeats, and fallback to HTTP long-polling when WebSockets are unavailable.
Do WebSockets work on Replit free tier?
Yes, but the free tier containers sleep after inactivity. When the container sleeps, all WebSocket connections are dropped. Paid deployments stay active.