Producer idempotence
Producer idempotence is a Kafka delivery property that makes producer retries safe from creating duplicate records while preserving record ordering.
Kafka Streams in Action, Second Edition
enable.idempotence is a Kafka producer configuration that enables idempotent record delivery.
- How it is used
- Prevents duplicate and out-of-order records when Kafka producers retry failed batches within a partition.
- How deep it goes
- Explains configuration, producer IDs, sequence numbers, broker validation, and the limitation to a single producer session.
- Examples
- Uses a Java KafkaProducer configuration listing with acknowledgments, retries, in-flight requests, and idempotence enabled.
- What you can do after
- Operate/configure KafkaProducer for ordered, nonduplicated delivery within each topic partition.
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Apache Kafka in Action
enable.idempotence is a Kafka producer setting that enables duplicate-safe retries of records.
- How it is used
- Protects Kafka record delivery and partition ordering when producer retries may repeat sends.
- How deep it goes
- Explains producer and sequence IDs, broker checks, required settings, retry behavior, and partition-level ordering.
- Examples
- Demonstrates Kafka console-producer flags and a Python transactional producer configured with idempotence.
- What you can do after
- Configure Kafka producers for duplicate-safe retries and diagnose retry-related ordering or acknowledgment problems.
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Kafka for Architects
enable.idempotence is a Kafka producer setting that enables broker-managed deduplication and ordering protection for producer retries.
- How it is used
- Protects Kafka event delivery from duplicates and partition-level reordering during asynchronous producer retries.
- How deep it goes
- Explains broker-side producer identifiers, sequence numbers, retriable errors, and required settings without exposing them through the Kafka API.
- Examples
- Uses lost acknowledgments, reordered batches, and Customer 360 operational data store configuration as concrete examples.
- What you can do after
- Apply it via Kafka producer configuration to preserve partition order and prevent duplicate batches during retries.
Read how Kafka for Architects explains producer idempotence →
Related concepts
- Kafka transactionused by · A Kafka transaction is an atomic operation that groups record production and related offset commits so their effects are committed together or aborted.
- Kafka producerconfigured by · A Kafka producer is an application or client that publishes records to Kafka topics.
- transactional producerimplemented by · A transactional producer is a Kafka producer mode that publishes records to multiple topics as one atomic transaction, committing all records together or none of them.
- idempotencyconfigures · Idempotency is the property of an operation whereby repeating it has the same effective result or externally observable effect as performing it once.
- ordering guaranteeconfigures · An ordering guarantee is a promise that related operations or records are observed or processed in a specified sequence.
- exactly-once deliveryimplements · Exactly-once delivery is a messaging or processing guarantee that each message or input produces its intended effect once, without loss or duplicate effects, despite retries or failures.
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