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https://issues.apache.org/jira/browse/HADOOP-11891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14520360#comment-14520360
 ] 

Hadoop QA commented on HADOOP-11891:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  15m  2s | Pre-patch trunk compilation is 
healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:red}-1{color} | tests included |   0m  0s | 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:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | javac |   7m 45s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 47s | 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 |   5m 28s | There were no new checkstyle 
issues. |
| {color:green}+1{color} | install |   1m 34s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 34s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   1m 40s | The patch does not introduce 
any new Findbugs (version 2.0.3) warnings. |
| {color:green}+1{color} | common tests |  22m 43s | Tests passed in 
hadoop-common. |
| | |  65m  2s | |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12729295/HADOOP-11891.2.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 3dd6395 |
| hadoop-common test log | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/6219/artifact/patchprocess/testrun_hadoop-common.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/6219/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.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/6219/console |


This message was automatically generated.

> OsSecureRandom should lazily fill its reservoir
> -----------------------------------------------
>
>                 Key: HADOOP-11891
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11891
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>             Fix For: 2.7.1
>
>         Attachments: HADOOP-11891.1.patch, HADOOP-11891.2.patch
>
>
> The {{OsSecureRandom}} class that is initialized by on the the 
> {{CryptoCodec}} implementations eagerly fills its reservoir of random bits. 
> This will result in too many file descriptors being opened simply and is not 
> really required if the client already has a random IV and key needed for 
> decryption.



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