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Posted to commits@beam.apache.org by "Raghu Angadi (JIRA)" <ji...@apache.org> on 2017/10/06 01:26:00 UTC

[jira] [Commented] (BEAM-2720) Exact-once Kafka sink

    [ https://issues.apache.org/jira/browse/BEAM-2720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16194020#comment-16194020 ] 

Raghu Angadi commented on BEAM-2720:
------------------------------------

Filed BEAM-3025 about caveats with the current implementation. Some of these are simple to address and some are not.

> Exact-once Kafka sink
> ---------------------
>
>                 Key: BEAM-2720
>                 URL: https://issues.apache.org/jira/browse/BEAM-2720
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-java-extensions
>            Reporter: Raghu Angadi
>            Assignee: Raghu Angadi
>
> Kafka 0.11 added support for transactions which allows end-to-end exactly-once semantics. Beam's KafkaIO users can benefit from these while using runners that support exactly-once processing.
> I have an implementation of EOS support for Kafka sink : https://github.com/apache/beam/pull/3612
> It has two shuffles and builds on Beam state-API and checkpoint barrier between stages (as in Dataflow). Pull request has a longer description.



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