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https://issues.apache.org/jira/browse/HDFS-17267?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17791757#comment-17791757
 ] 

ASF GitHub Bot commented on HDFS-17267:
---------------------------------------

hadoop-yetus commented on PR #6311:
URL: https://github.com/apache/hadoop/pull/6311#issuecomment-1834467377

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |||| _ Patch Compile Tests _ |
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   | +1 :green_heart: |  mvninstall  |   1m  5s |  |  the patch passed  |
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   | -1 :x: |  blanks  |   0m  0s | 
[/blanks-eol.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6311/1/artifact/out/blanks-eol.txt)
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[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6311/1/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt)
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   |  |   | 298m 32s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | hadoop.hdfs.server.datanode.TestDirectoryScanner |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
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https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6311/1/artifact/out/Dockerfile
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   | GITHUB PR | https://github.com/apache/hadoop/pull/6311 |
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   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6311/1/testReport/ |
   | Max. process+thread count | 4021 (vs. ulimit of 5500) |
   | modules | C: hadoop-hdfs-project/hadoop-hdfs-client 
hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6311/1/console |
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> Client send the smae packet multiple times when method markSlowNode throws 
> IOException.
> ---------------------------------------------------------------------------------------
>
>                 Key: HDFS-17267
>                 URL: https://issues.apache.org/jira/browse/HDFS-17267
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 3.3.6
>            Reporter: farmmamba
>            Assignee: farmmamba
>            Priority: Major
>              Labels: pull-request-available
>
> Since we have HDFS-16348, we can kick out SLOW node in pipeline when writing 
> data to pipeline. 
> And I think it introduced a problem, that is the same packet will be sent 
> twice or more times when we kick out SLOW node.
>  
> The flow are as below:
> 1、 DFSPacket p1 is pushed into dataQueue.
> 2、DataStreamer takes DFSPacket p1 from dataQueue.
> 3、Remove p1 from dataQueue and   push p1 into ackQueue.
> 4、sendPacket(p1).
> 5、In ResponseProcessor#run,  read pipelineAck for p1.
> 6、We meet SlOW node,  so method markSlowNode throw IOException and does not 
> execute `ackQueue.removeFirst();`.
> 7、In next loop of DataStreamer#run, we come into method 
> processDatanodeOrExternalError and execute `dataQueue.addAll(0, ackQueue);`.
> 8、the p1 will be sent repeatedly.
>  



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