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https://issues.apache.org/jira/browse/FLINK-5702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15855325#comment-15855325
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Tzu-Li (Gordon) Tai commented on FLINK-5702:
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[~StephanEwen] Good point about changing the default. In this case we might
need to think about migrating the {{FlinkKafkaProducerBase}} also though, as
changing the default is a user-behaviour breaking change. I'll open a separate
JIRA for this.
> Kafka Producer docs should warn if using setLogFailuresOnly, at-least-once is
> compromised
> -----------------------------------------------------------------------------------------
>
> Key: FLINK-5702
> URL: https://issues.apache.org/jira/browse/FLINK-5702
> Project: Flink
> Issue Type: Improvement
> Components: Documentation, Kafka Connector
> Reporter: Tzu-Li (Gordon) Tai
>
> The documentation for FlinkKafkaProducer does not have any information about
> the {{setLogFailuresOnly}}. It should emphasize that if users choose to only
> log failures instead of failing the sink, at-least-once can not be guaranteed
> .
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