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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-8992) Implement source and operator that validate exactly-once
Date Fri, 27 Apr 2018 13:58:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-8992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16456480#comment-16456480
] 

ASF GitHub Bot commented on FLINK-8992:
---------------------------------------

Github user StefanRRichter commented on the issue:

    https://github.com/apache/flink/pull/5925
  
    LGTM šŸ‘ Will merge this.


> Implement source and operator that validate exactly-once
> --------------------------------------------------------
>
>                 Key: FLINK-8992
>                 URL: https://issues.apache.org/jira/browse/FLINK-8992
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Tests
>    Affects Versions: 1.5.0
>            Reporter: Stefan Richter
>            Assignee: Stefan Richter
>            Priority: Major
>
> We can buildĀ this with sources that emit sequences per key and a stateful (keyed) operator
that validate for the update of each key that the new value is the old value + 1. This can
help to easily detect if events/state were lost or duplicates.



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