Data & AI

Transactional Outbox Pattern with Kafka

Data & AI Pipelines diagram · made in Skemio

Transactional Outbox architecture showing application writing to business and outbox tables in one transaction, captured by Debezium into Kafka.
Transactional Outbox architecture showing application writing to business and outbox tables in one transaction, captured by Debezium into Kafka.
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What it shows

  • Network drops after a DB commit leave Kafka completely out of sync
  • Writing business data and outbox events in one ACID transaction guarantees safety
  • Debezium CDC tails Postgres WAL logs to publish events asynchronously

The takeaway

Eliminate 2PC complexity by writing domain state and outbox events into the same atomic DB transaction.

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