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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5002) AM could potentially allocate a reduce container to a map attempt
Date Thu, 10 Sep 2015 19:55:46 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14739476#comment-14739476
] 

Hadoop QA commented on MAPREDUCE-5002:
--------------------------------------

\\
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| (x) *{color:red}-1 overall{color}* |
\\
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  16m 22s | 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 |   7m 58s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  10m 30s | 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 |   0m 33s | There were no new checkstyle issues. |
| {color:red}-1{color} | whitespace |   0m  0s | The patch has 3  line(s) that end in whitespace.
Use git apply --whitespace=fix. |
| {color:green}+1{color} | install |   1m 27s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 34s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   1m  6s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | mapreduce tests |   9m 20s | Tests passed in hadoop-mapreduce-client-app.
|
| | |  48m 18s | |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12755195/MAPREDUCE-5002.4.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 7766610 |
| whitespace | https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5977/artifact/patchprocess/whitespace.txt
|
| hadoop-mapreduce-client-app test log | https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5977/artifact/patchprocess/testrun_hadoop-mapreduce-client-app.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5977/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/5977/console |


This message was automatically generated.

> AM could potentially allocate a reduce container to a map attempt
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-5002
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5002
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mr-am
>    Affects Versions: 2.0.3-alpha, 0.23.7, 2.7.0
>            Reporter: Jason Lowe
>            Assignee: Chang Li
>         Attachments: MAPREDUCE-5002.1.patch, MAPREDUCE-5002.2.patch, MAPREDUCE-5002.2.patch,
MAPREDUCE-5002.3.patch, MAPREDUCE-5002.4.patch, MAPREDUCE-5002.5.patch
>
>
> As discussed in MAPREDUCE-4982, after MAPREDUCE-4893 it is theoretically possible for
the AM to accidentally assign a reducer container to a map attempt if the AM doesn't find
a reduce attempt actively looking for the container (e.g.: the RM accidentally allocated too
many reducer containers).



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