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Posted to hdfs-issues@hadoop.apache.org by "Xiaoqiao He (Jira)" <ji...@apache.org> on 2023/05/14 13:36:00 UTC

[jira] [Resolved] (HDFS-16985) Fix data missing issue when delete local block file.

     [ https://issues.apache.org/jira/browse/HDFS-16985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiaoqiao He resolved HDFS-16985.
--------------------------------
       Fix Version/s: 3.4.0
        Hadoop Flags: Reviewed
    Target Version/s:   (was: 3.3.1)
          Resolution: Fixed

> Fix data missing issue when delete local block file.
> ----------------------------------------------------
>
>                 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
>             Fix For: 3.4.0
>
>
> 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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