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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6682) Improve performance of AssignmentInformation datastructures
Date Thu, 01 Jun 2017 22:19:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-6682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16033806#comment-16033806
] 

Hadoop QA commented on YARN-6682:
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| (x) *{color:red}-1 overall{color}* |
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| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  0s{color} | {color:blue}
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| {color:red}-1{color} | {color:red} docker {color} | {color:red}  0m 12s{color} | {color:red}
Docker failed to build yetus/hadoop:5970e82. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | YARN-6682 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12870870/YARN-6682.branch-2.8.patch
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| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/16073/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Improve performance of AssignmentInformation datastructures
> -----------------------------------------------------------
>
>                 Key: YARN-6682
>                 URL: https://issues.apache.org/jira/browse/YARN-6682
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>    Affects Versions: 2.8.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: YARN-6682.branch-2.8.patch, YARN-6682.branch-2.patch, YARN-6682.trunk.patch
>
>
> {{AssignmentInformation}} is inefficient and creates lots of garbage that increase gc
pressure.  It creates 3 hashmaps that each contain only 2 enum-based keys. This requires wrapper
node objects, boxing/unboxing of ints, and more expensive lookups than simply using primitive
arrays indexed by enum ordinal.



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