* fix(distributed): self-heal stale 'model not loaded' routing
In distributed mode the registry can list a model as loaded on a node
while the worker has evicted it (autonomous LRU eviction, an out-of-band
unload, etc.) yet the backend process survives. The router's cached-node
check only verifies the process is alive (probeHealth), so it routes there
and inference fails with "<backend>: model not loaded" — and stays broken
until the controller restarts and rebuilds its registry.
InFlightTrackingClient now reconciles this: when a tracked inference call
returns a model-not-loaded error, it drops the stale replica row
(RemoveNodeModel) so the next request reloads the model on a healthy node
instead of routing back to the evicted one. The original error is returned
unchanged; only the registry is corrected.
Assisted-by: Claude:claude-opus-4-8 go vet
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
* refactor(distributed): typed model-not-loaded error via gRPC status code
Replace the controller-side error-string match with a shared, code-aware
helper. Go error types don't survive the gRPC boundary, so the signal is
carried as a status code (FailedPrecondition):
- pkg/grpc/grpcerrors: ModelNotLoaded(backend) constructor +
IsModelNotLoaded(err) checker (status-code first, message fallback for
backends not yet migrated).
- InFlightTrackingClient.reconcile now uses grpcerrors.IsModelNotLoaded.
- Migrate the Go backends that emit this error (parakeet-cpp, cloud-proxy,
rfdetr-cpp) to the typed constructor.
Acting on a false positive is harmless (the model is just reloaded).
Assisted-by: Claude:claude-opus-4-8 go vet
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
---------
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Co-authored-by: Ettore Di Giacinto <mudler@localai.io>
