[jira] [Closed] (FLINK-28976) Changelog 1st materialization delayed unneccesarily

["Roman Khachatryan (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-28976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Roman Khachatryan closed FLINK-28976.
-------------------------------------
    Resolution: Fixed

Merged into master as 91e1291e942afc69779f09ead549352d5d357f22 .. a38b852bbbdb812aa404c226717a2fa3bdd89665,
into release-1.15 as 493a1aa8556038283e256efc5368bd319bd06d17 .. 258c3e35265bb3a966bd317340f2a5fe7cfd7364.


> Changelog 1st materialization delayed unneccesarily
> ---------------------------------------------------
>
>                 Key: FLINK-28976
>                 URL: https://issues.apache.org/jira/browse/FLINK-28976
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / State Backends
>    Affects Versions: 1.15.1, 1.16.0
>            Reporter: Roman Khachatryan
>            Assignee: Roman Khachatryan
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.16.0, 1.15.3
>
>
> In PeriodicMaterializationManager.start(), the 1st materialization is scheduled with a delay: materialization_interval + random_offset 
> Here, random_offset is added to avoid thundering herd problem.
> The next materialization will be scheduled with a delay of only materialization_interval.
> That means that the 1st materialization will have to compact up to 2 times more state changes than the subsequent ones. 
> Which in turn can cause FLINK--26590 or other problems.



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