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101f086204
Gates genuine reconnects PER DEVICE before the heavy register work (DB writes + playlist build) runs, so a single flapping device can no longer saturate the event loop and take down the server. - Actuator is per-device, keyed on device_id (modeled on lastPlayLogAt). A device is flagged only when it exceeds reconnectBaseMax genuine reconnects per window. Same-socket playlist refreshes (isPlaylistRefresh) are exempt. - Load-awareness is BANDED (normal/elevated/critical from the step-2 lag signal), not a continuous controller. The band only MULTIPLIES an already-flagged device's backoff; global lag never gates a healthy device. - Hysteresis: escalate immediately while storming (tighten fast); decay one level per reconnectReleaseMs of calm (release slow). - HARD CEILING per device, independent of band and warm-up — a slow-ramp attacker can't train through it. - COLD START: for reconnectWarmupMs after boot, force the normal band and apply only the hard ceiling, so a full-fleet reconnect after a deploy doesn't throttle healthy screens. State is in-memory, resets on restart. - Observability: every throttle engagement logs device, band, observed vs allowed rate, and backoff. Throttled device gets device:throttled + a deferred disconnect. Tests (api.test.js style): - unit: healthy-never-throttled, storm-throttled-with-growing-backoff, band multiplies backoff, hard-ceiling-even-in-warmup, warm-up leniency, neighbor isolation, slow release. - integration GATE (the required one): full-fleet reconnect right after restart throttles NO healthy device; a single device storming IS throttled; a neighbor stays unaffected while another storms. - also fixes pre-existing test PORT collisions (my new integration files clashed with totp.test.js:3979 and totp-keyrotation.test.js:3980 -> moved to 3982/3983); full suite now green serially AND in parallel. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> |
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| deviceSocket.js | ||
| index.js | ||