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https://issues.apache.org/jira/browse/KAFKA-2076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14389553#comment-14389553
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Jay Kreps commented on KAFKA-2076:
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In terms of mechanics we did a discussion on the consumer api a while back but
there are several changes since then and I think we should do a KIP on it from
scratch. If there is a proposal for adding this functionality that we can work
out fairly quickly on this ticket I think it is fine to fold that in to the
overall consumer KIP.
> Add an API to new consumer to allow user get high watermark of partitions.
> --------------------------------------------------------------------------
>
> Key: KAFKA-2076
> URL: https://issues.apache.org/jira/browse/KAFKA-2076
> Project: Kafka
> Issue Type: Improvement
> Reporter: Jiangjie Qin
>
> We have a use case that user wants to know how far it is behind a particular
> partition on startup. Currently in each fetch response, we have high
> watermark for each partition, we only keep a global max-lag metric. It would
> be better that we keep a record of high watermark per partition and update it
> on each fetch response. We can add a new API to let user query the high
> watermark.
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