[ https://issues.apache.org/jira/browse/HADOOP-12985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiaoyu Yao updated HADOOP-12985:
--------------------------------
    Attachment: HADOOP-12985.03.patch

Fix the checkstyle issue.

> Support MetricsSource interface for DecayRpcScheduler Metrics
> -------------------------------------------------------------
>
>                 Key: HADOOP-12985
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12985
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Xiaoyu Yao
>            Assignee: Xiaoyu Yao
>         Attachments: HADOOP-12985.00.patch, HADOOP-12985.02.patch, HADOOP-12985.03.patch
>
>
> This allows metrics collector such as AMS to collect it with MetricsSink. The per user RPC call counts, schedule decisions and per priority response time will be useful to detect and trouble shoot Hadoop RPC server such as Namenode overload issues. 



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