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https://issues.apache.org/jira/browse/HDFS-7648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14330239#comment-14330239
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Tsz Wo Nicholas Sze commented on HDFS-7648:
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> We can help the users by pointing out that there is a problem with the block
> layout.
The problem is already known to the users. Pointing out does not help much.
> If there is a bug in the software, we cannot automatically fix the bug ...
Mmm ... We are not fixing the software bug but fixing the blocks/data. Also,
there is a conf. So it is manually but not automatically.
I wish there is a way to automatically fix a future software bug. :)
> Verify the datanode directory layout
> ------------------------------------
>
> Key: HDFS-7648
> URL: https://issues.apache.org/jira/browse/HDFS-7648
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Rakesh R
> Attachments: HDFS-7648-3.patch, HDFS-7648-4.patch, HDFS-7648-5.patch,
> HDFS-7648.patch, HDFS-7648.patch
>
>
> HDFS-6482 changed datanode layout to use block ID to determine the directory
> to store the block. We should have some mechanism to verify it. Either
> DirectoryScanner or block report generation could do the check.
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