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https://issues.apache.org/jira/browse/HADOOP-9420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13864094#comment-13864094
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Hadoop QA commented on HADOOP-9420:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment 
  http://issues.apache.org/jira/secure/attachment/12621770/HADOOP-9420-v2.txt
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author 
tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new 
or modified test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any 
warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with 
eclipse:eclipse.

    {color:red}-1 findbugs{color}.  The patch appears to introduce 4 new 
Findbugs (version 1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in 
hadoop-common-project/hadoop-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/3408//testReport/
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/3408//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-common.html
Console output: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/3408//console

This message is automatically generated.

> Add percentile or max metric for rpcQueueTime, processing time
> --------------------------------------------------------------
>
>                 Key: HADOOP-9420
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9420
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc, metrics
>    Affects Versions: 2.0.3-alpha
>            Reporter: Todd Lipcon
>            Assignee: Liang Xie
>         Attachments: HADOOP-9420-v2.txt, HADOOP-9420.txt
>
>
> Currently, we only export averages for rpcQueueTime and rpcProcessingTime. 
> These metrics are most useful when looking at timeouts and slow responses, 
> which in my experience are often caused by momentary spikes in load, which 
> won't show up in averages over the 15+ second time intervals often used by 
> metrics systems. We should collect at least the max queuetime and processing 
> time over each interval, or the percentiles if it's not too expensive.



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