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https://issues.apache.org/jira/browse/MAPREDUCE-6376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14603648#comment-14603648
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Hadoop QA commented on MAPREDUCE-6376:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch |  18m 21s | Pre-patch trunk has 1 extant 
Findbugs (version 3.0.0) warnings. |
| {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 41s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 39s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 23s | 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  1s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 35s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   3m 43s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | mapreduce tests |   9m  4s | Tests passed in 
hadoop-mapreduce-client-app. |
| {color:green}+1{color} | mapreduce tests |   0m 47s | Tests passed in 
hadoop-mapreduce-client-common. |
| {color:green}+1{color} | mapreduce tests |   1m 44s | Tests passed in 
hadoop-mapreduce-client-core. |
| | |  55m 23s | |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12742208/MAPREDUCE-6376.004.patch
 |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / aa07dea |
| Pre-patch Findbugs warnings | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5845/artifact/patchprocess/trunkFindbugsWarningshadoop-mapreduce-client-app.html
 |
| hadoop-mapreduce-client-app test log | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5845/artifact/patchprocess/testrun_hadoop-mapreduce-client-app.txt
 |
| hadoop-mapreduce-client-common test log | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5845/artifact/patchprocess/testrun_hadoop-mapreduce-client-common.txt
 |
| hadoop-mapreduce-client-core test log | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5845/artifact/patchprocess/testrun_hadoop-mapreduce-client-core.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5845/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf903.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-MAPREDUCE-Build/5845/console |


This message was automatically generated.

> Fix long load times of .jhist file in JobHistoryServer
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-6376
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6376
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: jobhistoryserver
>    Affects Versions: 2.7.0
>            Reporter: Ray Chiang
>            Assignee: Ray Chiang
>              Labels: supportability
>         Attachments: MAPREDUCE-6376.001.patch, MAPREDUCE-6376.002.patch, 
> MAPREDUCE-6376.003.patch, MAPREDUCE-6376.004.patch
>
>
> When you click on a Job link in the JHS Web UI, it loads the .jhist file.  
> For jobs which have a large number of tasks, the load time can break UI 
> responsiveness.



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