[ 
https://issues.apache.org/jira/browse/HADOOP-13410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15617053#comment-15617053
 ] 

Hadoop QA commented on HADOOP-13410:
------------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
14s{color} | {color:blue} Docker mode activated. {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:red}-1{color} | {color:red} test4tests {color} | {color:red}  0m  
0s{color} | {color:red} The patch doesn't appear to include any new or modified 
tests. Please justify why no new tests are needed for this patch. Also please 
list what manual steps were performed to verify this patch. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  7m 
48s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  7m  
4s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
28s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
2s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
12s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
23s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
42s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
38s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  7m 
11s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  7m 
11s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
22s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
58s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
33s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
43s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  6m 51s{color} 
| {color:red} hadoop-common in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
21s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 39m  7s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.net.TestClusterTopology |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:9560f25 |
| JIRA Issue | HADOOP-13410 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12835921/HADOOP-13410.002.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux c276506dd745 3.13.0-95-generic #142-Ubuntu SMP Fri Aug 12 
17:00:09 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | trunk / 112f04e |
| Default Java | 1.8.0_101 |
| findbugs | v3.0.0 |
| unit | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/10925/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/10925/testReport/ |
| modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/10925/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> RunJar adds the content of the jar twice to the classpath
> ---------------------------------------------------------
>
>                 Key: HADOOP-13410
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13410
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>            Reporter: Sangjin Lee
>            Assignee: Yuanbo Liu
>         Attachments: HADOOP-13410.001.patch, HADOOP-13410.002.patch
>
>
> Today when you run a "hadoop jar" command, the jar is unzipped to a temporary 
> location and gets added to the classloader.
> However, the original jar itself is still added to the classpath.
> {code}
>       List<URL> classPath = new ArrayList<>();
>       classPath.add(new File(workDir + "/").toURI().toURL());
>       classPath.add(file.toURI().toURL());
>       classPath.add(new File(workDir, "classes/").toURI().toURL());
>       File[] libs = new File(workDir, "lib").listFiles();
>       if (libs != null) {
>         for (File lib : libs) {
>           classPath.add(lib.toURI().toURL());
>         }
>       }
> {code}
> As a result, the contents of the jar are present in the classpath *twice* and 
> are completely redundant. Although this does not necessarily cause 
> correctness issues, some stricter code written to require a single presence 
> of files may fail.
> I cannot think of a good reason why the jar should be added to the classpath 
> if the unjarred content was added to it. I think we should remove the jar 
> from the classpath.



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