#exactly-once
2 posts.
Why Kafka Transactions Cannot Commit with Your Database Yet: KIP-939 and 2PC Participation
Learn what Kafka transactions can commit today, why databases and external systems remain outside that boundary, and how KIP-939 proposes to let Kafka participate in externally coordinated 2PC.
kafkatransactionsexactly-oncearchitecturereliability
Kafka EOS: What Is Actually Exactly Once?
A precise look at what Kafka Exactly-Once Semantics protects across producer retries, transactions, and consumer offsets—and why keys, headers, and event IDs are not broker-side deduplication rules.
kafkaexactly-oncetransactionsconsumersreliability