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https://issues.apache.org/jira/browse/FLINK-7210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16116064#comment-16116064
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ASF GitHub Bot commented on FLINK-7210:
---------------------------------------

Github user tzulitai commented on the issue:

    https://github.com/apache/flink/pull/4368
  
    Alright, this looks good to merge now!
    Merging ..


> Add TwoPhaseCommitSinkFunction (implementing exactly-once semantic in generic 
> way)
> ----------------------------------------------------------------------------------
>
>                 Key: FLINK-7210
>                 URL: https://issues.apache.org/jira/browse/FLINK-7210
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming Connectors
>            Reporter: Piotr Nowojski
>            Assignee: Piotr Nowojski
>
> To implement exactly-once sink there is a re-occurring pattern for doing it - 
> two phase commit algorithm. It is used both in `BucketingSink` and in 
> `Pravega` sink and it will be used in `Kafka 0.11` connector. It would be 
> good to extract this common logic into one class, both to improve existing 
> implementation (for exampe `Pravega`'s sink doesn't abort interrupted 
> transactions) and to make it easier for the users to implement their own 
> custom exactly-once sinks.



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