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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8492) DN should notify NN when client requests a missing block
Date Thu, 27 Oct 2016 09:16:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15611293#comment-15611293

Vinayakumar B commented on HDFS-8492:

Patch needs rebase

> DN should notify NN when client requests a missing block
> --------------------------------------------------------
>                 Key: HDFS-8492
>                 URL: https://issues.apache.org/jira/browse/HDFS-8492
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha
>            Reporter: Daryn Sharp
>            Assignee: Walter Su
>         Attachments: HDFS-8492.01.patch
> If the DN has a block its volume map but not on-disk, it tells clients it's an invalid
block id.  The NN is not informed of the missing block until either the bp slice scanner or
the directory scanner detects the missing block.  DN should remove the replica from the volume
map and inform the NN.

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