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Date: Fri, 29 Jul 2016 04:00:24 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12906251.1445350957000.165096.1469764824612@Atlassian.JIRA>
In-Reply-To: <JIRA.12906251.1445350957000@Atlassian.JIRA>
References: <JIRA.12906251.1445350957000@Atlassian.JIRA> <JIRA.12906251.1445350957309@arcas>
Subject: [jira] [Commented] (YARN-4280) CapacityScheduler reservations may
 not prevent indefinite postponement on a busy cluster
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archived-at: Fri, 29 Jul 2016 04:00:26 -0000


    [ https://issues.apache.org/jira/browse/YARN-4280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15398671#comment-15398671 ] 

Hadoop QA commented on YARN-4280:
---------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 15s {color} | {color:blue} Docker mode activated. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m 0s {color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m 0s {color} | {color:green} The patch appears to include 1 new or modified test files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m 40s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 32s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 23s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 38s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 17s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m 56s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 20s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 31s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 29s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 29s {color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 21s {color} | {color:red} hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager: The patch generated 1 new + 288 unchanged - 5 fixed = 289 total (was 293) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 35s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 14s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 0s {color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 1s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 18s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 36m 24s {color} | {color:green} hadoop-yarn-server-resourcemanager in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 16s {color} | {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 50m 48s {color} | {color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:9560f25 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12820864/YARN-4280.014.patch |
| JIRA Issue | YARN-4280 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs  checkstyle  |
| uname | Linux c4924b124011 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 |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 8ebf2e9 |
| Default Java | 1.8.0_101 |
| findbugs | v3.0.0 |
| checkstyle | https://builds.apache.org/job/PreCommit-YARN-Build/12558/artifact/patchprocess/diff-checkstyle-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt |
|  Test Results | https://builds.apache.org/job/PreCommit-YARN-Build/12558/testReport/ |
| modules | C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager |
| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/12558/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.


> CapacityScheduler reservations may not prevent indefinite postponement on a busy cluster
> ----------------------------------------------------------------------------------------
>
>                 Key: YARN-4280
>                 URL: https://issues.apache.org/jira/browse/YARN-4280
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacity scheduler
>    Affects Versions: 2.6.1, 2.8.0, 2.7.1
>            Reporter: Kuhu Shukla
>            Assignee: Kuhu Shukla
>         Attachments: YARN-4280-branch-2.009.patch, YARN-4280-branch-2.8.001.patch, YARN-4280-branch-2.8.002.patch, YARN-4280-branch-2.8.003.patch, YARN-4280.001.patch, YARN-4280.002.patch, YARN-4280.003.patch, YARN-4280.004.patch, YARN-4280.005.patch, YARN-4280.006.patch, YARN-4280.007.patch, YARN-4280.008.patch, YARN-4280.008_.patch, YARN-4280.009.patch, YARN-4280.010.patch, YARN-4280.011.patch, YARN-4280.012.patch, YARN-4280.013.patch, YARN-4280.014.patch
>
>
> Consider the following scenario:
> There are 2 queues A(25% of the total capacity) and B(75%), both can run at total cluster capacity. There are 2 applications, appX that runs on Queue A, always asking for 1G containers(non-AM) and appY runs on Queue B asking for 2 GB containers.
> The user limit is high enough for the application to reach 100% of the cluster resource. 
> appX is running at total cluster capacity, full with 1G containers releasing only one container at a time. appY comes in with a request of 2GB container but only 1 GB is free. Ideally, since appY is in the underserved queue, it has higher priority and should reserve for its 2 GB request. Since this request puts the alloc+reserve above total capacity of the cluster, reservation is not made. appX comes in with a 1GB request and since 1GB is still available, the request is allocated. 
> This can continue indefinitely causing priority inversion.


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