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https://issues.apache.org/jira/browse/FLINK-24152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17409546#comment-17409546
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Seth Wiesman commented on FLINK-24152:
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+1
There is a fairly large caveats section for exactly once writes to Kafka, but
if we can come up with sensible defaults I think this would be a huge win.
I also wonder if this should be the default for all connectors that support
exactly-once writes; JDBC today and pulsar (I think in 1.15).
https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/connectors/datastream/kafka/#caveats
> Exactly-once semantics should be configurable through Flink configuration only
> ------------------------------------------------------------------------------
>
> Key: FLINK-24152
> URL: https://issues.apache.org/jira/browse/FLINK-24152
> Project: Flink
> Issue Type: Improvement
> Reporter: Matthias
> Priority: Major
>
> Exactly-once constraint needs to be configured in multiple locations:
> 1. Flink configuration
> 2. Kafka connector configuration
> As a user, I would expect to set this configuration parameter in Flink. The
> Kafka connector should be able to derive this configuration parameter from
> the Flink configuration by default. Setting it on the connector level could
> be considered as an advanced configuration parameter which would overwrite
> the default configuration.
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