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Oversell Incident

Goal​

Overselling should be prevented by DB constraints + transactional locks. Investigate if discrepancies appear.

Checks​

  • Reserved seating uniqueness constraints exist and are correct
  • Finalization transaction uses SELECT ... FOR UPDATE where required
  • Hold expiration sweeper is running and healthy

Response​

  • Freeze sales for affected event
  • Reconcile issued tickets vs capacity
  • Communicate with organizers/customers if needed