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https://issues.apache.org/jira/browse/YARN-3768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14607866#comment-14607866
 ] 

Hadoop QA commented on YARN-3768:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  18m 12s | 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} | tests included |   0m  0s | The patch appears to 
include 1 new or modified test files. |
| {color:green}+1{color} | javac |   7m 37s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 38s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 22s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   1m 47s | There were no new checkstyle 
issues. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 36s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 31s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   3m 27s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | common tests |  22m 36s | Tests passed in 
hadoop-common. |
| {color:green}+1{color} | yarn tests |   1m 57s | Tests passed in 
hadoop-yarn-common. |
| | |  67m 47s | |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12742721/YARN-3768.004.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / d3797f9 |
| hadoop-common test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8384/artifact/patchprocess/testrun_hadoop-common.txt
 |
| hadoop-yarn-common test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8384/artifact/patchprocess/testrun_hadoop-yarn-common.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/8384/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf907.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-YARN-Build/8384/console |


This message was automatically generated.

> Index out of range exception with environment variables without values
> ----------------------------------------------------------------------
>
>                 Key: YARN-3768
>                 URL: https://issues.apache.org/jira/browse/YARN-3768
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: yarn
>    Affects Versions: 2.5.0
>            Reporter: Joe Ferner
>            Assignee: zhihai xu
>         Attachments: YARN-3768.000.patch, YARN-3768.001.patch, 
> YARN-3768.002.patch, YARN-3768.003.patch, YARN-3768.004.patch
>
>
> Looking at line 80 of org.apache.hadoop.yarn.util.Apps an index out of range 
> exception occurs if an environment variable is encountered without a value.
> I believe this occurs because java will not return empty strings from the 
> split method. Similar to this 
> http://stackoverflow.com/questions/14602062/java-string-split-removed-empty-values



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