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https://issues.apache.org/jira/browse/KAFKA-21001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias J. Sax reassigned KAFKA-21001:
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Assignee: Matthias J. Sax
> Sticky assignor ("streams" protocol) ignores warm-up tasks for stickiness
> -------------------------------------------------------------------------
>
> Key: KAFKA-21001
> URL: https://issues.apache.org/jira/browse/KAFKA-21001
> Project: Kafka
> Issue Type: Improvement
> Components: group-coordinator, streams
> Affects Versions: 4.5.0
> Reporter: Matthias J. Sax
> Assignee: Matthias J. Sax
> Priority: Major
> Fix For: 4.5.0
>
>
> The broker-side StickyTaskAssignor receives each member's current assignment
> but computes stickiness from only its active and standby tasks —
> MemberAssignmentState.warmupTasks() is never read. A warm-up task is a member
> restoring the state of an active task being migrated to it, so a re-computed
> assignment can send that task elsewhere and discard the restore work.
> Latent today (ie, Ak 4.4 or older releases), because no warm-up task are not
> supported yet.
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