17 days ago
I'm having some issues where at random times (could be 5 seconds after a request, could be 5 minutes), the connection breaks and the chat stream in our application stops. The connection was happening over public network, and I switched it to use private network (had to duplicate a service in a different project) and it started working much better. Any ideas why this might be happening?
1 Replies
Status changed to Awaiting Railway Response Railway • 17 days ago
17 days ago
This thread has been opened as a bounty so the community can help solve it.
Status changed to Open Railway • 17 days ago
17 days ago
if you must keep services on public networking, apply these two fixes in your streaming service:
- Send Keep-Alive Ping Comments Every 15–30 Seconds
If using Server-Sent Events (SSE) or HTTP chunked streaming, periodically flush dummy comment frames to prevent intermediate proxies from timing out:
JavaScript
// Example for Express / Node.js SSE stream
const keepAliveInterval = setInterval(() => {
res.write(': keep-alive\n\n'); // SSE comment frame ignored by client UI
}, 15000);
req.on('close', () => clearInterval(keepAliveInterval));
- Disable Response Buffering Headers
Force edge proxies and Cloudflare not to buffer stream responses:
HTTP
X-Accel-Buffering: no
Cache-Control: no-cache, no-transform
Content-Type: text/event-stream
Connection: keep-alive
Recommended Setup on Railway
For backend-to-backend long-lived connections or streaming pipelines, using Private Networking is the best architectural practice on Railway because it provides lower latency, zero edge proxy timeouts, and better overall stability.