Error codes
service.not-ready
The backend received a request before its readiness probe transitioned to ready.
service.not-ready is returned at HTTP 503.
When this fires
Emitted by HealthzController during boot when the application is up but its dependencies (DB, migrations, ONNX models) are still loading. The load balancer should not forward traffic in this window; this code is the safety net when it does.
What to do
Retry — the readiness probe converges within seconds of process start. If the condition persists more than a minute, the backend is in a hard boot failure and the deploy should be rolled back.
See also
- SDK reference — the Python and TypeScript SDKs raise typed exceptions for codes in this namespace.
- Error code index — every code the runtime can return.