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Posted to jira@kafka.apache.org by "Boyang Chen (JIRA)" <ji...@apache.org> on 2019/02/06 02:22:00 UTC

[jira] [Resolved] (KAFKA-7899) Command line tool to invalidate group metadata for clean assignment

     [ https://issues.apache.org/jira/browse/KAFKA-7899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Boyang Chen resolved KAFKA-7899.
--------------------------------
    Resolution: Invalid

It appears that the metadata should be generated by the client instead of broker. So basically this is invalid issue.

> Command line tool to invalidate group metadata for clean assignment
> -------------------------------------------------------------------
>
>                 Key: KAFKA-7899
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7899
>             Project: Kafka
>          Issue Type: New Feature
>          Components: consumer, streams
>    Affects Versions: 1.1.0
>            Reporter: Boyang Chen
>            Assignee: Boyang Chen
>            Priority: Major
>
> Right now the group metadata will affect consumers under sticky assignment, since it persists previous topic partition assignment which affects the judgement of consumer leader. Specifically for KStream applications (under 1.1), if we are scaling up the cluster, it is hard to balance the traffic since most tasks would still go to "previous round active" assignments, even though we hope them to move towards other hosts.
> It would be preferable to have a tool to invalidate the group metadata stored on broker, so that for sticky assignment we could have a clean start.



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