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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12325) RPC Metrics : Add the ability track and log slow RPCs
Date Thu, 20 Aug 2015 18:53:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14705546#comment-14705546
] 

Xiaoyu Yao commented on HADOOP-12325:
-------------------------------------

The unit test failure does not seem to be related to this change. [~anu], can you fix the
checkstyle issues?

> RPC Metrics : Add the ability track and log slow RPCs
> -----------------------------------------------------
>
>                 Key: HADOOP-12325
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12325
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: ipc, metrics
>    Affects Versions: 2.7.1
>            Reporter: Anu Engineer
>            Assignee: Anu Engineer
>         Attachments: HADOOP-12325.001.patch, HADOOP-12325.002.patch
>
>
> This JIRA proposes to add a counter called RpcSlowCalls and also a configuration setting
that allows users to log really slow RPCs.  Slow RPCs are RPCs that fall at 99th percentile.
This is useful to troubleshoot why certain services like name node freezes under heavy load.



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