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#142's content-ack dedup is insufficient: a device cycling 2-4 content IDs makes every ack look unique so dedup never fires, while aggregate volume from ~30 devices saturates the event loop (the #142 reconnect throttle kept the server responsive, which is how this was even observable). Folded ONE control on the content-ack path (no competing limiters; reconnect- throttle.js untouched) in lib/content-ack-limiter.js: - Step 1 — per-device RATE budget: caps TOTAL non-duplicate acks per device per window regardless of differing content_id (the case dedup misses). Over budget = DROP silently (the per-ack log+emit is the cost); log ONCE per device per window when shedding starts. Keeps the #142 dedup (dedup'd repeats don't consume budget). Per-device, in-memory, resets on restart (modeled on lastPlayLogAt; does NOT reuse reconnect-throttle's ban-semantics bucket). Env (TUNING GUESSES, validate vs Bold's fleet): CONTENT_ACK_MAX_PER_WINDOW=20, CONTENT_ACK_RATE_WINDOW_MS=10000 (=2/s, above legit ~<=1/s, below the flood). - Step 2 — global pressure valve: reuses the #142 loop-lag band (+ its hysteresis, no second control loop). Under CRITICAL band, shed content-acks even for an in-budget device; reconnects + dashboard/HTTP are ALWAYS processed; a healthy device in a non-critical band is never touched by the valve. Valve open/close logged once at the band edge in services/loop-lag.js (not per shed message). Tests (unique ports 3985/3986, not the 3982/3983/3984 set): - unit: the #143 regression (cycling ids evading dedup IS rate-limited), under/over budget, dedup still works + doesn't consume budget, valve sheds in-budget under critical while normal is untouched, rate precedence, window reset, per-device isolation. - integration: socket flood is capped to budget with a single shed-start log; under-budget passes every ack; valve OPEN sheds content-acks while a reconnect + /api/status still succeed. Full suite green serial AND parallel (208 tests). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> |
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| .. | ||
| admin-users.test.js | ||
| agency-digest.test.js | ||
| agency-gate.test.js | ||
| agency-layouts.test.js | ||
| agency-list.test.js | ||
| agency-scope.test.js | ||
| agency.test.js | ||
| ai-design.test.js | ||
| api.test.js | ||
| apitoken-unit.test.js | ||
| branding.test.js | ||
| config-paths.test.js | ||
| content-ack-dedup.test.js | ||
| content-ack-flood.test.js | ||
| content-ack-limiter.test.js | ||
| content-ack-valve.test.js | ||
| device-zone-contract.test.js | ||
| i18n-tokens.test.js | ||
| loop-lag-integration.test.js | ||
| loop-lag.test.js | ||
| mute.test.js | ||
| openapi-contract.test.js | ||
| operator-permissions.test.js | ||
| pair-lockout.test.js | ||
| pip-overlay.test.js | ||
| provisioning-cleanup.test.js | ||
| provisioning.test.js | ||
| reconnect-throttle-integration.test.js | ||
| reconnect-throttle.test.js | ||
| schedule-eval.test.js | ||
| schema-check.test.js | ||
| security-fixes.test.js | ||
| status-log-prune.test.js | ||
| tenant-cascade-migration.test.js | ||
| thumbnail-proxy.test.js | ||
| tizen-eval-drift.test.js | ||
| totp-keyrotation.test.js | ||
| totp-unit.test.js | ||
| totp.test.js | ||
| user-deletion.test.js | ||
| widget-render-xss.test.js | ||