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https://issues.apache.org/jira/browse/HADOOP-12627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15049387#comment-15049387
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Masatake Iwasaki commented on HADOOP-12627:
-------------------------------------------
Test failures are not related because the patch only fixes documentation. I
already filed HADOOP-12602 to address the failure of
{{TestMetricsSystemImpl#testQSize}} and will appreciate committer's review for
the patch.
> Add user documentation about metrics system
> -------------------------------------------
>
> Key: HADOOP-12627
> URL: https://issues.apache.org/jira/browse/HADOOP-12627
> Project: Hadoop Common
> Issue Type: Improvement
> Components: documentation, metrics
> Affects Versions: 2.7.1
> Reporter: Masatake Iwasaki
> Assignee: Masatake Iwasaki
> Attachments: HADOOP-12627.001.patch
>
>
> Though there is [reference of metric
> items|https://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-common/Metrics.html]
> and
> [Javadoc|https://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-project/api/org/apache/hadoop/metrics2/package-summary.html],
> we have no user documentation to configure metrics system.
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