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https://issues.apache.org/jira/browse/KAFKA-7699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17777550#comment-17777550
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Matthias J. Sax commented on KAFKA-7699:
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Happy to support you. The KIP wiki page describes how it works:
[https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals]
– if you have any questions about it, happy to answer them.
> Improve wall-clock time punctuations
> ------------------------------------
>
> Key: KAFKA-7699
> URL: https://issues.apache.org/jira/browse/KAFKA-7699
> Project: Kafka
> Issue Type: New Feature
> Components: streams
> Reporter: Matthias J. Sax
> Priority: Major
> Labels: needs-kip
>
> Currently, wall-clock time punctuation allow to schedule periodic call backs
> based on wall-clock time progress. The punctuation time starts, when the
> punctuation is scheduled, thus, it's non-deterministic what is desired for
> many use cases (I want a call-back in 5 minutes from "now").
> It would be a nice improvement, to allow users to "anchor" wall-clock
> punctation, too, similar to a cron job: Thus, a punctuation would be
> triggered at "fixed" times like the beginning of the next hour, independent
> when the punctuation was registered.
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