fix(run-engine,webapp): resolve dequeue worker version fresh per task - #4622
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🔇 Additional comments (3)
WalkthroughThe run engine now passes task and queue context to worker-version resolution. Resolver queries can filter worker tasks and queues across development, promoted, and fallback deployments. The webapp adds a feature flag for fresh reads and retains the legacy cache path when disabled. Integration tests cover promotion, rollback, development re-registration, filtering, cache behavior, and dequeue execution. A changelog entry documents the fix. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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The fresh-read flag is optional and defaults on, so existing resolver constructions keep working; the control-plane resolver tests assert the fresh (no-cache) default and cover the kill-switch cache path.
Summary
After a deployment promotion or rollback, newly triggered runs could keep dispatching onto the previously deployed version for up to 30 seconds. Runs now resolve the current version fresh on every dequeue, so a promotion or rollback takes effect immediately.
Fix
The dequeue path resolved the worker version through a 30s in-process cache that nothing invalidated on promotion, and it loaded the worker's entire task and queue set only to keep the single row matching the run. Both go away: the resolve now fetches just the matched task and queue by unique index and reads them fresh, so there is no cache left to serve a stale version.
A kill-switch env var (
RUN_OPS_WORKER_VERSION_FRESH_READ_ENABLED, default on) falls back to the old cached path without a code deploy.Verified end-to-end on an isolated stack: a run triggered after a mid-stream promotion now dequeues onto the new version, with the previous stale behavior reproduced first.