processing.guarantee — Kafka Kafka Streams Configuration
The processing guarantee that should be used. Possible values are at_least_once (default) and exactly_once_v2 (requires brokers version 2.
Description
The processing guarantee that should be used. Possible values are at_least_once (default) and exactly_once_v2 (requires brokers version 2.5 or higher). Deprecated options are exactly_once (requires brokers version 0.11.0 or higher) and exactly_once_beta (requires brokers version 2.5 or higher). Note that exactly-once processing requires a cluster of at least three brokers by default what is the recommended setting for production; for development you can change this, by adjusting broker setting transaction.state.log.replication.factor and transaction.state.log.min.isr.
Default Values by Kafka Version
| Kafka Version | Default Value |
|---|---|
| 0.11.0 | at_least_once |
| 1.0 | at_least_once |
| 1.1 | at_least_once |
| 2.0 | at_least_once |
| 2.1 | at_least_once |
| 2.2 | at_least_once |
| 2.3 | at_least_once |
| 2.4 | at_least_once |
| 2.5 | at_least_once |
| 2.6 | at_least_once |
| 2.7 | at_least_once |
| 2.8 | at_least_once |
| 3.0 | at_least_once |
| 3.1 | at_least_once |
| 3.2 | at_least_once |
| 3.3 | at_least_once |
| 3.4 | at_least_once |
| 3.5 | at_least_once |
| 3.6 | at_least_once |
| 3.7 | at_least_once |
| 3.8 | at_least_once |
| 3.9 | at_least_once |
| 4.0 | at_least_once |
| 4.1 | at_least_once |
| 4.2 | at_least_once |
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