[jira] [Assigned] (KAFKA-6323) punctuate with WALL_CLOCK_TIME triggered immediately

["Guozhang Wang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-6323?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guozhang Wang reassigned KAFKA-6323:
------------------------------------

    Assignee: Frederic Arno

> punctuate with WALL_CLOCK_TIME triggered immediately
> ----------------------------------------------------
>
>                 Key: KAFKA-6323
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6323
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 1.0.0
>            Reporter: Frederic Arno
>            Assignee: Frederic Arno
>             Fix For: 1.1.0, 1.0.1
>
>
> When working on a custom Processor from which I am scheduling a punctuation using WALL_CLOCK_TIME. I've noticed that whatever the punctuation interval I set, a call to my Punctuator is always triggered immediately.
> Having a quick look at kafka-streams' code, I could find that all PunctuationSchedule's timestamps are matched against the current time in order to decide whether or not to trigger the punctuator (org.apache.kafka.streams.processor.internals.PunctuationQueue#mayPunctuate). However, I've only seen code that initializes PunctuationSchedule's timestamp to 0, which I guess is what is causing an immediate punctuation.
> At least when using WALL_CLOCK_TIME, shouldn't the PunctuationSchedule's timestamp be initialized to current time + interval?



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