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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5540) scheduler spends too much time looking at empty priorities
Date Tue, 13 Sep 2016 16:23:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-5540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15487644#comment-15487644
] 

Hadoop QA commented on YARN-5540:
---------------------------------

| (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 19s {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 41s {color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 33s {color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 20s {color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 39s {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 23s {color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 37s {color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 36s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 36s {color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 19s {color}
| {color:green} hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:
The patch generated 0 new + 6 unchanged - 2 fixed = 6 total (was 8) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 44s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 16s {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 16s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 22s {color} |
{color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 38m 16s {color} | {color:red}
hadoop-yarn-server-resourcemanager in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 17s {color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 53m 34s {color} | {color:black}
{color} |
\\
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|| Reason || Tests ||
| Failed junit tests | hadoop.yarn.server.resourcemanager.TestRMAdminService |
\\
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:9560f25 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12828282/YARN-5540.004.patch
|
| JIRA Issue | YARN-5540 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs
 checkstyle  |
| uname | Linux 8e6c89b22b23 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 / e793309 |
| Default Java | 1.8.0_101 |
| findbugs | v3.0.0 |
| unit | https://builds.apache.org/job/PreCommit-YARN-Build/13096/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt
|
| unit test logs |  https://builds.apache.org/job/PreCommit-YARN-Build/13096/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-YARN-Build/13096/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/13096/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> scheduler spends too much time looking at empty priorities
> ----------------------------------------------------------
>
>                 Key: YARN-5540
>                 URL: https://issues.apache.org/jira/browse/YARN-5540
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacity scheduler, fairscheduler, resourcemanager
>    Affects Versions: 2.7.2
>            Reporter: Nathan Roberts
>            Assignee: Jason Lowe
>         Attachments: YARN-5540.001.patch, YARN-5540.002.patch, YARN-5540.003.patch, YARN-5540.004.patch
>
>
> We're starting to see the capacity scheduler run out of scheduling horsepower when running
500-1000 applications on clusters with 4K nodes or so.
> This seems to be amplified by TEZ applications. TEZ applications have many more priorities
(sometimes in the hundreds) than typical MR applications and therefore the loop in the scheduler
which examines every priority within every running application, starts to be a hotspot. The
priorities appear to stay around forever, even when there is no remaining resource request
at that priority causing us to spend a lot of time looking at nothing.
> jstack snippet:
> {noformat}
> "ResourceManager Event Processor" #28 prio=5 os_prio=0 tid=0x00007fc2d453e800 nid=0x22f3
runnable [0x00007fc2a8be2000]
>    java.lang.Thread.State: RUNNABLE
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerApplicationAttempt.getResourceRequest(SchedulerApplicationAttempt.java:210)
>         - eliminated <0x00000005e73e5dc0> (a org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignContainers(LeafQueue.java:852)
>         - locked <0x00000005e73e5dc0> (a org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp)
>         - locked <0x00000003006fcf60> (a org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue.assignContainersToChildQueues(ParentQueue.java:527)
>         - locked <0x00000003001b22f8> (a org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue.assignContainers(ParentQueue.java:415)
>         - locked <0x00000003001b22f8> (a org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.allocateContainersToNode(CapacityScheduler.java:1224)
>         - locked <0x0000000300041e40> (a org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler)
> {noformat}



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