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From "Vahid Hashemian (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 Wed, 08 Nov 2017 15:53:00 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-6184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16244198#comment-16244198
] 

Vahid Hashemian commented on KAFKA-6184:
----------------------------------------

[~huxi_2b] For next time, could you please ask the current assignee of the JIRA (and wait
a few days in case there is no response) before reassigning to yourself? I believe that's
the unofficial rule the Kafka community goes by. Thanks.

> 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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