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https://issues.apache.org/jira/browse/HDFS-16985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17714370#comment-17714370
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ASF GitHub Bot commented on HDFS-16985:
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hadoop-yetus commented on PR #5564:
URL: https://github.com/apache/hadoop/pull/5564#issuecomment-1515612188

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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[/branch-spotbugs-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5564/2/artifact/out/branch-spotbugs-hadoop-hdfs-project_hadoop-hdfs.txt)
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[/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5564/2/artifact/out/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1.txt)
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[/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5564/2/artifact/out/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09.txt)
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[/buildtool-patch-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5564/2/artifact/out/buildtool-patch-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt)
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[/patch-mvnsite-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5564/2/artifact/out/patch-mvnsite-hadoop-hdfs-project_hadoop-hdfs.txt)
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[/patch-javadoc-hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5564/2/artifact/out/patch-javadoc-hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1.txt)
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[/patch-spotbugs-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5564/2/artifact/out/patch-spotbugs-hadoop-hdfs-project_hadoop-hdfs.txt)
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[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5564/2/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt)
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   | GITHUB PR | https://github.com/apache/hadoop/pull/5564 |
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   | modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
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   | Console output | 
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> delete local block file when FileNotFoundException occurred may lead to 
> missing block.
> --------------------------------------------------------------------------------------
>
>                 Key: HDFS-16985
>                 URL: https://issues.apache.org/jira/browse/HDFS-16985
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>            Reporter: Chengwei Wang
>            Assignee: Chengwei Wang
>            Priority: Major
>              Labels: pull-request-available
>
> We encounterd several missing-block problem in our production cluster which  
> hdfs  running on AWS EC2 + EBS.
> The root cause:
>  # the block remains only 1 replication left and hasn't been reconstruction
>  # DN checks block file existing when BlockSender construction
>  # the EBS checking failed and throw FileNotFoundException (EBS may be in 
> fault condition)
>  # DN invalidateBlock and schedule block  async deletion
>  # EBS already back to normal when DN do delete block
>  # the block file be delete permanently and can't be recovered



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