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Posted to jira@kafka.apache.org by "Boyang Chen (Jira)" <ji...@apache.org> on 2019/10/29 22:44:00 UTC

[jira] [Updated] (KAFKA-9112) Combine streams `onAssignment` with `partitionsAssigned` task creation

     [ https://issues.apache.org/jira/browse/KAFKA-9112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Boyang Chen updated KAFKA-9112:
-------------------------------
    Component/s: streams

> Combine streams `onAssignment` with `partitionsAssigned` task creation
> ----------------------------------------------------------------------
>
>                 Key: KAFKA-9112
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9112
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>            Reporter: Boyang Chen
>            Priority: Major
>
> Task manager needs to call `createTasks` inside partitionsAssigned callback, which is after the `onAssignment` callback for assignor. This means during task creation we rely on the status change based on the intermediate data structures populated by a different callback, which is hard to reason about. We should consider consolidate logics to either one of the callbacks, prefer `onAssignment` as it contains full information needed.



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