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https://issues.apache.org/jira/browse/HDFS-17218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17775769#comment-17775769
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ASF GitHub Bot commented on HDFS-17218:
---------------------------------------

hadoop-yetus commented on PR #6176:
URL: https://github.com/apache/hadoop/pull/6176#issuecomment-1764565321

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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Ubuntu-11.0.20.1+1-post-Ubuntu-0ubuntu120.04  |
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   |||| _ Other Tests _ |
   | -1 :x: |  unit  | 239m 25s | 
[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6176/6/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt)
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   |  |   | 407m  9s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | hadoop.hdfs.server.datanode.TestDirectoryScanner |
   
   
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   | modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
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> NameNode should remove its excess blocks from the ExcessRedundancyMap When a 
> DN registers
> -----------------------------------------------------------------------------------------
>
>                 Key: HDFS-17218
>                 URL: https://issues.apache.org/jira/browse/HDFS-17218
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namanode
>            Reporter: Haiyang Hu
>            Assignee: Haiyang Hu
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: image-2023-10-12-15-52-52-336.png
>
>
> Currently found that DN will lose all pending DNA_INVALIDATE blocks if it 
> restarts.
> *Root case*
> Current DN enables asynchronously deletion, it have many pending deletion 
> blocks in memory.
> when DN restarts, these cached blocks may be lost. it causes some blocks in 
> the excess map in the namenode to be leaked and this will result in many 
> blocks having more replicas then expected.
> *solution*
> Consider NameNode should remove its excess blocks from the 
> ExcessRedundancyMap When a DN registers,
> this approach will ensure that when processing the DN's full block report, 
> the 'processExtraRedundancy' can be performed according to the actual of the 
> blocks.



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