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Ettore Di Giacinto
93af91419b
The scheduler decided whether a worker had gone away from nats.ErrNoResponders: one frontend's observation that nobody answered IT within a request budget. Two replicas asking in the same moment could disagree and demote each other's workers, and a worker re-homing its tunnel between replicas looked identical to one that had died. SmartRouter now reads cluster.Presence instead. Only PresenceGone -- no live replica holds the tunnel AND the departure has outlived the reconnect grace -- excludes a node from placement, and it is a fact every replica reads identically from the database. PresenceReconnecting, PresenceUnknown and a failed presence query are all non-verdicts and place work as normal: excluding on a database hiccup would cost the fleet its capacity for a reason that has nothing to do with any worker. nodeAnswersOnBus is deleted. It excluded on a sentinel no control RPC can produce, so it decided nothing while PingNode cost a relayed round trip per scheduling decision to feed it. PingNode goes with it, from the adapter and from NodeCommandSender. isRequestTimeout drops nats.ErrTimeout: every verb this adapter sends now travels over the worker's tunnel. The predicate is named nodeMayTakeWork rather than nodeHasRoute. "Route" is ErrWorkerUnroutable in this package, the condition nobody may act on; PresenceGone is the one a scheduler may. Spelling them the same way is the collapse this work exists to prevent. Also folds in ReapStale's return rename: it counts connection rows CLEARED, never rows deleted, and reading it as a delete count would make a worker that is re-dialling right now look forgotten. The spec pinning that a message merely quoting "nats: timeout" is not a timeout was scripting a SUCCESSFUL reply carrying the phrase, which comes back with a nil error and never reaches the classifier. Restoring the string match left it green. It now scripts a 5xx whose body carries the phrase, and asserts that the phrase reaches the classifier as a precondition. Assisted-by: Claude Opus 5 [claude-code] Signed-off-by: Ettore Di Giacinto <mudler@localai.io>