Fix “Durable Object reset because its code was updated”
Why a deploy makes Cloudflare Durable Objects throw “reset because its code was updated”, and how to retry safely, keep clients connected and lose no state.
Boris Tane Troubleshooting. Step-by-step fixes for common production errors on AWS, Kubernetes, Cloudflare, Vercel, Postgres and the rest of a modern stack.
Troubleshooting guides start from a symptom you can see: an error code in the browser, a 504 from a serverless function, a database connection that keeps failing. Each one explains what the error means, the usual causes in order of how often they happen and the fix for each.
They are written for the engineer looking at the problem right now. Every guide shows the commands and code to find the cause, from tailing logs to tracing a slow request, then the change that fixes it and how to confirm the fix held. They cover Cloudflare Workers, Hyperdrive, Vercel functions, Kubernetes, Postgres and the other platforms teams deploy to most, and they say plainly when a problem is a platform limit and not your code. A guide that starts from one exact error message shows that message first, so you can check it matches yours.
How Polylane works on these platforms: Cloudflare, Vercel, Kubernetes, Supabase and Railway.
Boris Tane More guides
Fix Cloudflare “Error 1102: Worker exceeded resource limits”
Why a Cloudflare Worker returns Error 1102, how to tell a CPU time overrun from a 128 MB memory overrun, and the code and Wrangler changes that fix each.
Boris Tane Kubernetes CrashLoopBackOff: causes and fixes
What CrashLoopBackOff means in Kubernetes, how to read the exit code and events behind it, and the fix for each common cause, from bad config to failing probes.
Boris Tane Kubernetes OOMKilled (exit code 137): causes and fixes
Why Kubernetes reports OOMKilled with exit code 137, how to tell a limit kill from a node eviction or a plain SIGKILL, and how to size memory so it stops.
Boris Tane Fix “remaining connection slots are reserved” in PostgreSQL
Why Postgres refuses new logins with “remaining connection slots are reserved”, how to find who holds the connections, and how to pool and cap them for good.
Boris Tane Fix Prisma “P1001: Can't reach database server”
Why Prisma prints “P1001: Can't reach database server”, how to test the host and port it names, and how to fix private hosts, IPv6, paused databases and URLs.
Boris Tane Fix Railway “Application failed to respond” (502)
Why Railway returns “Application failed to respond” with a 502, how to tell a wrong host, port or target port from a crash or overload, and how to fix each.
Boris Tane Fix Render “Port scan timeout reached, no open ports detected”
Why a Render deploy fails with “Port scan timeout reached, no open ports detected”, how to spot the cause in the logs, and how to bind to 0.0.0.0 on PORT.
Boris Tane Fix Vercel “FUNCTION_INVOCATION_FAILED” 500 errors
Why a Vercel Function returns 500 FUNCTION_INVOCATION_FAILED, how to find the crash in runtime logs, and how to fix throws, missing env vars, files and memory.
Boris Tane Fix Vercel “MIDDLEWARE_INVOCATION_FAILED” errors
Why Vercel returns 500 MIDDLEWARE_INVOCATION_FAILED or EDGE_FUNCTION_INVOCATION_FAILED, how to find the failing middleware in logs, and how to fix it.
Boris Tane Fix “context deadline exceeded” in Docker and fly deploy
What “context deadline exceeded” means in Docker and fly deploy, how to find the call that timed out, and the fixes for WireGuard, builders and daemons.
Boris Tane Fix “error umounting /data: EBUSY” on Fly.io Machines
Why Fly.io logs “error umounting /data: EBUSY: Device or resource busy” at shutdown, how to find what stopped the Machine, and how to keep it running.
Boris Tane How to debug Vercel function timeouts
Debug Vercel FUNCTION_INVOCATION_TIMEOUT 504s: find the slow call with vercel logs and httpstat, fix hangs, set maxDuration and verify on a preview.
Boris Tane Cloudflare Hyperdrive connection errors: causes and fixes
Fix Cloudflare Hyperdrive connection errors: config codes 2008 to 2016, pool exhaustion, connection_refused and stale clients reused across Worker requests.
Boris Tane Cloudflare Workers error 1101: causes and how to fix it
Error 1101 means your Cloudflare Worker threw an uncaught JavaScript exception. Find the exception in logs, match it to its cause, fix it and roll back fast.
Boris Tane Vercel 504 Gateway Timeout on Serverless Functions: Causes and Fixes
Fix Vercel 504 FUNCTION_INVOCATION_TIMEOUT errors: current duration limits, how to find the slow call, the fix for each cause and how to raise maxDuration.
Boris Tane How to Debug Cloudflare Workers Errors: Logs, Traces and Error Codes
Debug Cloudflare Workers errors step by step: read 1101 and 1102 codes, enable Workers Logs and source maps, use wrangler tail, DevTools and local traces.
Boris Tane