Paste the deploy error. Get the fix.
Drop in an error message or a chunk of your deploy/runtime log — EADDRINUSE, CrashLoopBackOff, a 502, OOMKilled, SIGTERM, ECONNREFUSED — and get what it means, why it happens, and exactly how to fix it.
Most deploy errors are the same dozen failures
The error text changes, but the causes don't: a port collision, an app bound to 127.0.0.1 instead of 0.0.0.0, a missing dependency that was installed locally but not in the build, a secret that isn't set in prod, or a container that runs out of memory and gets killed. This tool matches your paste against the most common ones and gives you the specific fix — not a forum thread.
The pattern behind the 502
The single most-Googled deploy failure — "works locally, 502 in production" — is almost always one of three things: the app listens on the wrong interface, listens on the wrong port, or crashed on startup. The platform's proxy gets nothing back and returns a 502. Bind 0.0.0.0:$PORT, keep the process up, and read the startup logs.
Decode the error here. Stop shipping it in the first place.
Infraveil is a backend operations platform for configured managed services on servers you control. Where the release contract defines relevant checks, it can report bind, process, secret, and health failures before or during rollout and retain bounded deploy evidence. Those checks do not prove application correctness or guarantee that a broken release cannot ship.
See the live demo →Frequently asked questions
What does EADDRINUSE mean?
The port your app binds is already taken — a stale instance, two processes on one port, or a hardcoded port. Bind process.env.PORT, run one instance, kill the stale process.
Why does it work locally but 502 in production?
The proxy can't reach your app: bound to 127.0.0.1 not 0.0.0.0, wrong port, or it crashed on boot. Bind 0.0.0.0:$PORT and check startup logs. Full 502 guide →
What is CrashLoopBackOff?
Kubernetes restarting a container that keeps crashing. Read the previous container's logs — it's usually a bad start command, missing env/secret, failed dependency, or OOM.
How do I stop shipping these at all?
Gate deploys behind a healthcheck so a process that won't bind or stay up never goes live, with instant rollback. That's what Infraveil does →