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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12325) RPC Metrics : Add the ability track and log slow RPCs
Date Fri, 21 Aug 2015 22:57:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14707610#comment-14707610
] 

Anu Engineer commented on HADOOP-12325:
---------------------------------------

Thanks for your comments. I will re-factor the patch and upload.  

> 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: Callers of WritableRpcEngine.call.png, HADOOP-12325.001.patch, HADOOP-12325.002.patch,
HADOOP-12325.003.patch, HADOOP-12325.004.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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