KITFORMA · EDITORIAL ANSWER
How do I avoid committing a database change without sending its event?
KitForma editorial guide. A database transaction and an external message send usually do not share one atomic commit. A crash between them creates a consistency gap.
Step-by-step answer
A database transaction and an external message send usually do not share one atomic commit. A crash between them creates a consistency gap.
Write an outbox record in the same transaction as the business change, then let a worker publish pending records and track delivery attempts. Test crashes before commit, after commit and after publishing but before marking sent. Consumers must deduplicate because the last case can produce repeated delivery. An outbox improves reliable handoff, not magical exactly-once processing. Bound retries, monitor stuck records and preserve enough identifiers to reconcile uncertain delivery.
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