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https://issues.apache.org/jira/browse/KAFKA-13135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17387032#comment-17387032
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Ismael Juma commented on KAFKA-13135:
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The locking for this code is extremely complex and it's been a source of a lot
of bugs, so we should be very careful.
> Reduce GroupMetadata lock contention for offset commit requests
> ---------------------------------------------------------------
>
> Key: KAFKA-13135
> URL: https://issues.apache.org/jira/browse/KAFKA-13135
> Project: Kafka
> Issue Type: Improvement
> Reporter: David Mao
> Priority: Major
>
> as suggested by [~lbradstreet], we can look for similar optimizations to
> https://issues.apache.org/jira/browse/KAFKA-13134 in the offset commit path.
> It looks like there are some straightforward optimizations possible for the
> error path.
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