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https://issues.apache.org/jira/browse/YARN-9100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16881986#comment-16881986
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Hadoop QA commented on YARN-9100:
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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}  0m  7s{color} 
| {color:red} YARN-9100 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-9100 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12952056/YARN-9100.003.patch |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/24355/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


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> Add tests for GpuResourceAllocator and do minor code cleanup
> ------------------------------------------------------------
>
>                 Key: YARN-9100
>                 URL: https://issues.apache.org/jira/browse/YARN-9100
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Szilard Nemeth
>            Assignee: Peter Bacsko
>            Priority: Major
>         Attachments: YARN-9100.001.patch, YARN-9100.002.patch, 
> YARN-9100.003.patch
>
>
> Add tests for GpuResourceAllocator and do minor code cleanup
> - Improved log and exception messages
> - Added some new debug logs
> - Some methods are named like *Copy, these are returning copies of internal 
> data structures. The word "copy" is just a noise in their name, so they have 
> been renamed. Additionally, the copied data structures modified to be 
> immutable.
> - The waiting loop in method assignGpus were decoupled into a new class, 
> RetryCommand. 
> Some more words about the new class RetryCommand: 
> There are some similar waiting loops in the code in: AMRMClient, 
> AMRMClientAsync and even in GenericTestUtils (see waitFor method). 
> RetryCommand could be a future replacement of these duplicated code, as it 
> gives a solution to this waiting loop problem in a generic way.
> The only downside of the usage of RetryCommand in GpuResourceAllocator 
> (startGpuAssignmentLoop) is the ugly exception handling part, but that's 
> solely because how Java deals with checked exceptions vs. lambdas. If there's 
> a cleaner way to solve the exception handling, I'm open for any suggestions.



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