[jira] [Commented] (FLINK-8992) Implement source and operator that validate exactly-once

[ASF GitHub Bot (JIRA)]

    [ 
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:
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Github user StefanRRichter commented on the issue:

    https://github.com/apache/flink/pull/5925
  
    LGTM 👍 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 build 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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