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https://issues.apache.org/jira/browse/HADOOP-11903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14613974#comment-14613974
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Hadoop QA commented on HADOOP-11903:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s 
{color} | {color:blue} precommit patch detected. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m 0s 
{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
0s {color} | {color:green} Patch does not generate ASF License warnings. 
{color} |
| {color:green}+1{color} | {color:green} shellcheck {color} | {color:green} 0m 
4s {color} | {color:green} There were no new shellcheck issues. {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 
0s {color} | {color:green} Patch has no whitespace issues. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 0m 9s {color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12743593/HADOOP-11903.HADOOP-12111.00.patch
 |
| git revision | HADOOP-12111 / 0a607a2 |
| Optional Tests | asflicense shellcheck |
| uname | Linux asf906.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP 
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-HADOOP-Build/patchprocess/dev-support-test/personality/hadoop.sh
 |
| Default Java | 1.7.0_55 |
| Multi-JDK versions |  /home/jenkins/tools/java/jdk1.8.0:1.8.0 
/home/jenkins/tools/java/jdk1.7.0_55:1.7.0_55 |
| shellcheck | v0.3.3 (This is an old version that has serious bugs. Consider 
upgrading.) |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/7147/console |


This message was automatically generated.

> test-patch should fail any new classes called Default-foo
> ---------------------------------------------------------
>
>                 Key: HADOOP-11903
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11903
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: yetus
>    Affects Versions: HADOOP-12111
>            Reporter: Allen Wittenauer
>            Assignee: Kengo Seki
>         Attachments: HADOOP-11903.HADOOP-12111.00.patch
>
>
> In the past, we've named things like DefaultResourceCalculator, 
> DefaultContainerExecutor, and DefaultCodec that do nothing but cause problems 
> down the road since they are effectively version and functionality locked 
> forever.  If these examples had been named what they truly were (e.g., 
> MemoryResourceCalculator, SimpleContainerExecutor, and GZipCodec), the 
> defaults could then be changed in the future in a compatible way. 
> One way to enforce this is to prevent the creation of new classes called 
> Default-anything. 



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