Database write succeeded but event was never published
Teams observe data committed but downstream systems never receive the event. This is a classic transactional boundary failure where outbox pattern adoption closes the gap.
Common symptom variants
Primary playbook
When a database write succeeds but the event never arrives, your system is lying to downstream consumers. The outbox pattern fixes this without a distributed transaction or a message broker rewrite.
Recommended resource
A minimal schema, polling publisher template, and rollout checklist for reliable event publishing in .NET.
Related posts
Idempotency keys for APIs: stop duplicate orders, emails, and writes
When retries create duplicate side effects, idempotency keys are the only safe fix. This playbook shows how to design keys, store results, and prove duplicates cannot recur.
Crash Recovery: Reconciliation Loops That Prevent Double Orders
Build crash-proof trading bots with reconciliation loops that detect and correct out-of-sync state on restart—preventing double orders and orphan positions.