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https://issues.apache.org/jira/browse/KAFKA-3059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15081466#comment-15081466
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Jason Gustafson commented on KAFKA-3059:
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Would this call for a new request API (e.g. DeleteGroup or DeleteOffsets)? I'm
not sure we'd be able to have the command write to the offsets topic directly
without some significant changes. Currently, I think GroupMetadataManager only
consumes from the offsets topic when it assumes leadership for one of the
partitions, so external writes to these topics would lead to cache
inconsistency.
> ConsumerGroupCommand should allow resetting offsets for consumer groups
> -----------------------------------------------------------------------
>
> Key: KAFKA-3059
> URL: https://issues.apache.org/jira/browse/KAFKA-3059
> Project: Kafka
> Issue Type: Bug
> Reporter: Gwen Shapira
> Assignee: Jason Gustafson
>
> As discussed here:
> http://mail-archives.apache.org/mod_mbox/kafka-users/201601.mbox/%3CCA%2BndhHpf3ib%3Ddsh9zvtfVjRiUjSz%2B%3D8umXm4myW%2BpBsbTYATAQ%40mail.gmail.com%3E
> * Given a consumer group, remove all stored offsets
> * Given a group and a topic, remove offset for group and topic
> * Given a group, topic, partition and offset - set the offset for the
> specified partition and group with the given value
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