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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12421) Add jitter to RetryInvocationHandler
Date Wed, 30 Sep 2015 18:01:04 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14938179#comment-14938179
] 

Hadoop QA commented on HADOOP-12421:
------------------------------------

\\
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| (x) *{color:red}-1 overall{color}* |
\\
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  17m 36s | 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 |   8m  3s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  10m 15s | There were no new javadoc warning messages.
|
| {color:red}-1{color} | release audit |   0m 16s | The applied patch generated 1 release
audit warnings. |
| {color:green}+1{color} | checkstyle |   1m  6s | 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 30s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   1m 54s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | common tests |   7m 15s | Tests passed in hadoop-common. |
| | |  48m 34s | |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12764436/HADOOP-12421-v3.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 6c17d31 |
| Release Audit | https://builds.apache.org/job/PreCommit-HADOOP-Build/7745/artifact/patchprocess/patchReleaseAuditProblems.txt
|
| hadoop-common test log | https://builds.apache.org/job/PreCommit-HADOOP-Build/7745/artifact/patchprocess/testrun_hadoop-common.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/7745/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf905.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/7745/console |


This message was automatically generated.

> Add jitter to RetryInvocationHandler
> ------------------------------------
>
>                 Key: HADOOP-12421
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12421
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.8.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>         Attachments: HADOOP-12421-v1.patch, HADOOP-12421-v2.patch, HADOOP-12421-v3.patch
>
>
> Calls to NN can become synchronized across a cluster during NN failover. This leads to
a spike in requests until things recover. Making an already tricky time worse.



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