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https://issues.apache.org/jira/browse/KAFKA-2493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sönke Liebau resolved KAFKA-2493.
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Resolution: Won't Fix
As this has been dormant for a long time and no one reacted to my comment I'll
close this for now.
> Add ability to fetch only keys in consumer
> ------------------------------------------
>
> Key: KAFKA-2493
> URL: https://issues.apache.org/jira/browse/KAFKA-2493
> Project: Kafka
> Issue Type: Wish
> Components: consumer
> Reporter: Ivan Balashov
> Assignee: Neha Narkhede
> Priority: Minor
>
> Often clients need to find out which offsets contain necessary data. One of
> the possible solutions would be to iterate with small fetch size. However,
> this still leads to unnecessary data being transmitted in case keys already
> reference searched data. The ability to fetch keys only would simplify search
> for the necessary offset.
> Of course, there can be other scenarios where consumer needs keys only,
> without message part.
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