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https://issues.apache.org/jira/browse/HADOOP-11983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14546431#comment-14546431
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Hadoop QA commented on HADOOP-11983:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |   0m  0s | Pre-patch trunk compilation is 
healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:green}+1{color} | release audit |   0m 15s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:green}+1{color} | shellcheck |   0m  4s | There were no new shellcheck 
(v0.3.3) issues. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| | |   0m 22s | |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12733278/HADOOP-11983.001.patch 
|
| Optional Tests | shellcheck |
| git revision | trunk / 8f37873 |
| Java | 1.7.0_55 |
| 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 |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/6706/console |


This message was automatically generated.

> HADOOP_USER_CLASSPATH_FIRST works the opposite of what it is supposed to do
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-11983
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11983
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: scripts
>    Affects Versions: 3.0.0
>            Reporter: Sangjin Lee
>            Assignee: Sangjin Lee
>         Attachments: HADOOP-11983.001.patch
>
>
> The behavior of HADOOP_USER_CLASSPATH_FIRST works the opposite of what it 
> should do. If it is not set, HADOOP_CLASSPATH is prepended. If set, it is 
> appended.
> You can easily try out by doing something like
> {noformat}
> HADOOP_CLASSPATH=/Users/alice/tmp hadoop classpath
> {noformat}
> (HADOOP_CLASSPATH should point to an existing directory)
> I think the if clause in hadoop_add_to_classpath_userpath is reversed.
> This issue seems specific to the trunk.



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