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Posted to jira@kafka.apache.org by "Matthias J. Sax (Jira)" <ji...@apache.org> on 2020/04/01 17:15:00 UTC

[jira] [Updated] (KAFKA-9792) Improve sticky task assignment for previous active tasks

     [ https://issues.apache.org/jira/browse/KAFKA-9792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias J. Sax updated KAFKA-9792:
-----------------------------------
    Attachment: rebalance.txt

> Improve sticky task assignment for previous active tasks
> --------------------------------------------------------
>
>                 Key: KAFKA-9792
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9792
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>            Reporter: Sophie Blee-Goldman
>            Assignee: Sophie Blee-Goldman
>            Priority: Major
>         Attachments: rebalance.txt
>
>
> Due to the way the client quota is computed, we may end up passing over a client that is not yet full. This can cause us to “miss” the client while attempting to assign active tasks to their previous owners, and ultimately forcing an active task _away_ from its previous client.
> It’s not quite a bug, but it’s definitely sub-optimal behavior and can cause unnecessary task shuffling. It also makes the assignment harder to predict/debug
>  



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