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From "Akira AJISAKA (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12325) RPC Metrics : Add the ability track and log slow RPCs
Date Mon, 24 Aug 2015 06:48:46 GMT

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

Akira AJISAKA updated HADOOP-12325:
    Attachment: HADOOP-12325.005.test.patch

Attaching a patch to verify that the slow call is logged. Now the test fails.

> 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, HADOOP-12325.005.patch, HADOOP-12325.005.test.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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