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https://issues.apache.org/jira/browse/HADOOP-13470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15409051#comment-15409051
 ] 

Hadoop QA commented on HADOOP-13470:
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| (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 
10s{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:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m 
 0s{color} | {color:green} The patch appears to include 2 new or modified test 
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  7m 
39s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  7m 
21s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
25s{color} | {color:green} trunk passed {color} |
| {color:red}-1{color} | {color:red} mvnsite {color} | {color:red}  1m 
58s{color} | {color:red} hadoop-common in trunk failed. {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 
47s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
46s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
41s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  7m 
30s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  7m 
30s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
23s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} mvnsite {color} | {color:red}  2m 
14s{color} | {color:red} hadoop-common in the patch failed. {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
12s{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 
52s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
47s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  7m 
58s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
23s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 43m 41s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:9560f25 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12822249/HADOOP-13470.001.patch
 |
| JIRA Issue | HADOOP-13470 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 79c650b2ebe2 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 | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | trunk / 18d9e6e |
| Default Java | 1.8.0_101 |
| mvnsite | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/10184/artifact/patchprocess/branch-mvnsite-hadoop-common-project_hadoop-common.txt
 |
| findbugs | v3.0.0 |
| mvnsite | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/10184/artifact/patchprocess/patch-mvnsite-hadoop-common-project_hadoop-common.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/10184/testReport/ |
| modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/10184/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> GenericTestUtils$LogCapturer is flaky
> -------------------------------------
>
>                 Key: HADOOP-13470
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13470
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: test, util
>    Affects Versions: 2.8.0
>            Reporter: Mingliang Liu
>            Assignee: Mingliang Liu
>         Attachments: HADOOP-13470.000.patch, HADOOP-13470.001.patch
>
>
> {{GenericTestUtils$LogCapturer}} is useful for assertions against service 
> logs. However it should be fixed in following aspects:
> # In the constructor, it uses the stdout appender's layout.
> {code}
> Layout layout = Logger.getRootLogger().getAppender("stdout").getLayout();
> {code}
> However, the stdout appender may be named "console" or alike which makes the 
> constructor throw NPE. Actually the layout does not matter and we can use a 
> default pattern layout that only captures application logs.
> # {{stopCapturing()}} method is not working. The major reason is that the 
> {{appender}} internal variable is never assigned and thus removing it to stop 
> capturing makes no sense.
> # It does not support {{org.slf4j.Logger}} which is preferred to log4j in 
> many modules.
> # There is no unit test for it.
> This jira is to address these.



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