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From "huxihx (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-6184) report a metric of the lag between the consumer offset and the start offset of the log
Date Thu, 09 Nov 2017 03:10:00 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-6184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16245146#comment-16245146
] 

huxihx commented on KAFKA-6184:
-------------------------------

[~vahid] It's kind of weird. The assignee was empty when I assigned this jira yesterday. Maybe
we both did the assignment nearly at the same time.  Sorry for the seemingly impolite behavior.
Be free to claim it. Sorry again.

> report a metric of the lag between the consumer offset and the start offset of the log
> --------------------------------------------------------------------------------------
>
>                 Key: KAFKA-6184
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6184
>             Project: Kafka
>          Issue Type: Improvement
>    Affects Versions: 1.0.0
>            Reporter: Jun Rao
>            Assignee: huxihx
>
> Currently, the consumer reports a metric of the lag between the high watermark of a log
and the consumer offset. It will be useful to report a similar lag metric between the consumer
offset and the start offset of the log. If this latter lag gets close to 0, it's an indication
that the consumer may lose data soon.



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