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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4066) Large number of queues choke fair scheduler
Date Mon, 28 Sep 2015 05:58:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-4066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14910065#comment-14910065
] 

Hadoop QA commented on YARN-4066:
---------------------------------

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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 34s | 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} | javac |   7m 47s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |   9m 59s | 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:green}+1{color} | checkstyle |   0m 49s | 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 29s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 34s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   1m 29s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | yarn tests |  60m  4s | Tests passed in hadoop-yarn-server-resourcemanager.
|
| | |  99m 11s | |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12762639/YARN-4066-3.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 1c030c6 |
| hadoop-yarn-server-resourcemanager test log | https://builds.apache.org/job/PreCommit-YARN-Build/9280/artifact/patchprocess/testrun_hadoop-yarn-server-resourcemanager.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-YARN-Build/9280/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-YARN-Build/9280/console |


This message was automatically generated.

> Large number of queues choke fair scheduler
> -------------------------------------------
>
>                 Key: YARN-4066
>                 URL: https://issues.apache.org/jira/browse/YARN-4066
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.7.1
>            Reporter: Johan Gustavsson
>            Assignee: Johan Gustavsson
>         Attachments: YARN-4066-2.patch, YARN-4066-3.patch, yarn-4066-1.patch
>
>
> Due to synchronization and all the loops performed during queue creation, setting a large
amount of queues (12000+) will completely choke the scheduler. To deal with this some optimization
to "QueueManager.updateAllocationConfiguration(AllocationConfiguration queueConf)" should
be done to reduce the amount of unnesecary loops. The attached patch have been tested to work
with atleast 96000 queues. 



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