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Date: Tue, 22 Sep 2015 00:47:05 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
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Message-ID: <JIRA.12873062.1442426698000.34039.1442882825153@Atlassian.JIRA>
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Subject: [jira] [Commented] (HADOOP-12421) Add jitter to
 RetryInvocationHandler
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    [ https://issues.apache.org/jira/browse/HADOOP-12421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14901690#comment-14901690 ] 

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 |  21m 41s | 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 28s | There were no new javadoc warning messages. |
| {color:green}+1{color} | release audit |   0m 24s | The applied patch does not increase the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   1m 15s | The applied patch generated  1 new checkstyle issues (total was 6, now 7). |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that end in whitespace. |
| {color:green}+1{color} | install |   1m 29s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 32s | The patch built with eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   1m 52s | The patch does not introduce any new Findbugs (version 3.0.0) warnings. |
| {color:red}-1{color} | common tests |  20m 50s | Tests failed in hadoop-common. |
| | |  66m 37s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.io.retry.TestFailoverProxy |
|   | hadoop.ipc.TestIPC |
|   | hadoop.io.retry.TestRetryProxy |
| Timed out tests | org.apache.hadoop.io.compress.TestCodec |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12761522/HADOOP-12421-v1.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / b00392d |
| checkstyle |  https://builds.apache.org/job/PreCommit-HADOOP-Build/7684/artifact/patchprocess/diffcheckstylehadoop-common.txt |
| hadoop-common test log | https://builds.apache.org/job/PreCommit-HADOOP-Build/7684/artifact/patchprocess/testrun_hadoop-common.txt |
| Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/7684/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf900.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/7684/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
>
>
> 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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