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https://issues.apache.org/jira/browse/HDFS-17602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17902525#comment-17902525
 ] 

ASF GitHub Bot commented on HDFS-17602:
---------------------------------------

hadoop-yetus commented on PR #6991:
URL: https://github.com/apache/hadoop/pull/6991#issuecomment-2513676330

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
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generate ASF License warnings.  |
   |  |   | 182m 41s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.47 ServerAPI=1.47 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6991/12/artifact/out/Dockerfile
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   | GITHUB PR | https://github.com/apache/hadoop/pull/6991 |
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https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6991/12/testReport/ |
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   | modules | C: hadoop-hdfs-project/hadoop-hdfs-rbf U: 
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   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6991/12/console |
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> RBF mount point with SPACE order can not find the most available namespace, 
> it will choose an irrelevant namespace
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-17602
>                 URL: https://issues.apache.org/jira/browse/HDFS-17602
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: router
>            Reporter: Zhongkun Wu
>            Priority: Critical
>              Labels: pull-request-available
>         Attachments: image-2024-08-12-10-08-54-031.png, 
> image-2024-08-12-10-08-58-271.png, image-2024-08-12-10-12-48-428.png, 
> image-2024-08-12-10-14-20-580.png, image-2024-08-12-10-25-26-003.png, 
> image-2024-08-12-10-25-42-863.png
>
>
> !image-2024-08-12-10-08-58-271.png!
> In the 
> MultipleDestinationMountTableResolver.java we invoke 
> orderedResolver.getFirstNamespace(path, mountTableResult);
> It will then invoke this function in RouterResolver.java
> !image-2024-08-12-10-12-48-428.png!
> and now we are in 
> chooseFirstNamespace function in AvailableSpaceResolver.java 
> !image-2024-08-12-10-14-20-580.png!
>  
> The path parameter is the destination where we want to create a file
> the loc parameter is the mount point we set
>  
> this function will choose the most available namespace in all the namespace 
> we have in StateStore, which is not the same as the mount point we set for 
> our destination.
>  
> As a result we will get a namespace  irrelevant to the namespaces we set for 
> the destination path
>  
> !image-2024-08-12-10-25-42-863.png!
> in the log above:
> we get the namespace we don't set with our destination path, So the it will 
> choose the first namespace it sees and it's not really the most available 
> namespace among the namespaces we set for our destination
>  
>  
>  
>  



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