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https://issues.apache.org/jira/browse/HDFS-16286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17434741#comment-17434741
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Stephen O'Donnell commented on HDFS-16286:
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You may be interested in this tool which we developed to search for EC 
corruptions:

https://github.com/sodonnel/hdfs-ec-validator

I have not had time to try to bring it into Hadoop as an official tool.

> Debug tool to verify the correctness of erasure coding on file
> --------------------------------------------------------------
>
>                 Key: HDFS-16286
>                 URL: https://issues.apache.org/jira/browse/HDFS-16286
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: erasure-coding, tools
>    Affects Versions: 3.3.0, 3.3.1
>            Reporter: daimin
>            Assignee: daimin
>            Priority: Minor
>              Labels: pull-request-available
>
> Block data in erasure coded block group may corrupt and the block meta 
> (checksum) is unable to discover the corruption in some cases such as EC 
> reconstruction, related issues are:  HDFS-14768, HDFS-15186, HDFS-15240.
> In addition to HDFS-15759, there needs a tool to check erasure coded file 
> whether any block group has data corruption in case of other conditions 
> rather than EC reconstruction, or the feature HDFS-15759(validation during EC 
> reconstruction) is not open(which is close by default now).



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