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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12325) RPC Metrics : Add the ability track and log slow RPCs
Date Fri, 21 Aug 2015 19:26:46 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Anu Engineer updated HADOOP-12325:
----------------------------------
    Attachment: HADOOP-12325.003.patch

Fixed CheckStyle issues , two issues still remain, please ignore them.

* {{Server.java}} - File is too long
* Variable 'logSlowRPC' must be private  - it is a hadoop metric and follows the general pattern
in the file.

> 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, HADOOP-12325.003.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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