ReadMeFeed / Community knowledge
Real questions. Useful conversations. Find the people who know your stack.
Enable idempotent producers and Kafka transactions to write records exactly once, then verify with a read_committed consumer.
Enable Kafka exactly-once by turning on idempotent producers and using the transactional API. This guide shows the mechanism, a complete Java example, limits, and verification commands.
Kafka's exactly-once semantics simplify cross-system consistency, but idempotent and transactional producers serve different scopes. This post compares their configuration, latency impact, and operational gotchas with practical verification tips.
Kafka's idempotent producer kills retry-induced duplicates with one flag — if you respect the config contract and know it only covers a single partition per session.
Enable idempotent producers everywhere by default. Reserve Kafka transactions for consume-transform-produce pipelines where cross-partition atomicity matters. Here's the configuration, trade-offs, and verification checklist.
Goal Determine whether Kafka's idempotent producer, introduced in 0.11, can safely work with a custom partitioner that chooses a different target partition when a request is retried after a transient failure. Constraints and uncertainty Enabling enable.idempotence=true binds a monotonically increasing sequence number to the original partition and requires ac
apachekafka
kdeneon