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From "Rakesh R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7648) Verify that HDFS blocks are in the correct datanode directories
Date Mon, 21 Mar 2016 05:29:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15203741#comment-15203741

Rakesh R commented on HDFS-7648:

Thanks [~dwatzke], [~szetszwo]
bq. Agree that it should print out the actual and the expected directories.
I think we can utilize this parent jira to continue the discussion of corrective actions.
I've raised separate sub-task HDFS-10186 to improve logging part. Please take a look at it.

bq. Please also create a helper method but not duplicating the code.
I failed to understand it, could you please provide few more details.

> Verify that HDFS blocks are in the correct datanode directories
> ---------------------------------------------------------------
>                 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-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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