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https://issues.apache.org/jira/browse/YARN-2901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14388341#comment-14388341
 ] 

Hadoop QA commented on YARN-2901:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment 
  
http://issues.apache.org/jira/secure/attachment/12708369/apache-yarn-2901.4.patch
  against trunk revision 85dc3c1.

    {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}.  There were no new javadoc warning messages.

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

    {color:green}+1 findbugs{color}.  The patch does not introduce any new 
Findbugs (version 2.0.3) warnings.

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

    {color:red}-1 core tests{color}.  The patch failed these unit tests in 
hadoop-common-project/hadoop-common 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager
 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:

                  org.apache.hadoop.yarn.server.resourcemanager.TestRMRestart

Test results: 
https://builds.apache.org/job/PreCommit-YARN-Build/7166//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/7166//console

This message is automatically generated.

> Add errors and warning stats to RM, NM web UI
> ---------------------------------------------
>
>                 Key: YARN-2901
>                 URL: https://issues.apache.org/jira/browse/YARN-2901
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: nodemanager, resourcemanager
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>         Attachments: Exception collapsed.png, Exception expanded.jpg, Screen 
> Shot 2015-03-19 at 7.40.02 PM.png, apache-yarn-2901.0.patch, 
> apache-yarn-2901.1.patch, apache-yarn-2901.2.patch, apache-yarn-2901.3.patch, 
> apache-yarn-2901.4.patch
>
>
> It would be really useful to have statistics on the number of errors and 
> warnings in the RM and NM web UI. I'm thinking about -
> 1. The number of errors and warnings in the past 5 min/1 hour/12 hours/day
> 2. The top 'n'(20?) most common exceptions in the past 5 min/1 hour/12 
> hours/day
> By errors and warnings I'm referring to the log level.
> I suspect we can probably achieve this by writing a custom appender?(I'm open 
> to suggestions on alternate mechanisms for implementing this).



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