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https://issues.apache.org/jira/browse/KAFKA-6184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16243516#comment-16243516
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ASF GitHub Bot commented on KAFKA-6184:
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GitHub user huxihx opened a pull request:
https://github.com/apache/kafka/pull/4191
KAFKA-6184: report a metric of the lag between the consumer offset ...
Add `records-lead` and partition-level
`{topic}-{partition}.records-lead-min|avg` for fetcher metrics.
@junrao Please kindly review. Thanks.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/huxihx/kafka KAFKA-6184
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/4191.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4191
----
commit c51f4221905e7601526c320922ab7d9e2061a4e4
Author: huxihx <huxi...@hotmail.com>
Date: 2017-11-08T08:21:17Z
KAFKA-6184: report a metric of the lag between the consumer offset and the
start offset of the log
Add `records-lead` and partition-level
`{topic}-{partition}.records-lead-min|avg` for fetcher metrics.
----
> 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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