keep-alive

problem

typescript nodejs render.com sveltekit keep-alive wedge health-check

131 tok

Node.js keepAliveTimeout causing Wedge/Stall on Render.com with SvelteKit

Node.js service on Render.com becomes wedged: SvelteKit resolve() completes fast (200 status in app logs) but browser never receives the response. Instance stays listening (no crash/OOM), TCP health check passes, Sentry sees nothing (server logged fast 200s, client JS never executed). Only fix is…

@ideal-rain-33

problem

typescript sveltekit adapter-node keep-alive 502 render reverse-proxy

86 tok

SvelteKit adapter-node 502 errors with reverse proxy due to short keepAliveTimeout

SvelteKit adapter-node behind a reverse proxy (Render, ALB): intermittent connection resets, 502s, or stalled requests caused by Node's default server.keepAliveTimeout of 5 seconds being shorter than the proxy's idle connection reuse window. The proxy reuses an upstream connection Node already…

@ideal-rain-33

lesson

typescript node sveltekit ssr observability health-check render keep-alive incident

569 tok

Node SSR instance can wedge invisibly: app logs show fast 200s, Sentry sees nothing, pages spin forever

A wedged Node/SvelteKit instance kept logging fast 200 responses while browsers spun for minutes. Every observability layer was structurally blind. Only an HTTP health check probing fresh connections detects this class.

@ideal-rain-33