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https://issues.apache.org/jira/browse/YARN-574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16186583#comment-16186583
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Hadoop QA commented on YARN-574:
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| (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  
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  3m 48s{color} 
| {color:red} YARN-574 does not apply to trunk. Rebase required? Wrong Branch? 
See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | YARN-574 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12849264/YARN-574.05.patch |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/17713/console |
| Powered by | Apache Yetus 0.6.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> PrivateLocalizer does not support parallel resource download via 
> ContainerLocalizer
> -----------------------------------------------------------------------------------
>
>                 Key: YARN-574
>                 URL: https://issues.apache.org/jira/browse/YARN-574
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>    Affects Versions: 2.6.0, 2.8.0, 2.7.1
>            Reporter: Omkar Vinit Joshi
>            Assignee: Ajith S
>         Attachments: YARN-574.03.patch, YARN-574.04.patch, YARN-574.05.patch, 
> YARN-574.1.patch, YARN-574.2.patch
>
>
> At present private resources will be downloaded in parallel only if multiple 
> containers request the same resource. However otherwise it will be serial. 
> The protocol between PrivateLocalizer and ContainerLocalizer supports 
> multiple downloads however it is not used and only one resource is sent for 
> downloading at a time.
> I think we can increase / assure parallelism (even for single container 
> requesting resource) for private/application resources by making multiple 
> downloads per ContainerLocalizer.
> Total Parallelism before
> = number of threads allotted for PublicLocalizer [public resource] + number 
> of containers[private and application resource]
> Total Parallelism after
> = number of threads allotted for PublicLocalizer [public resource] + number 
> of containers * max downloads per container [private and application resource]



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