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Date: Tue, 16 Nov 2010 17:05:17 -0500 (EST)
From: "Hairong Kuang (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-1483) DFSClient.getBlockLocations returns
 BlockLocations with no indication that the corresponding blocks are corrupt
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    [ https://issues.apache.org/jira/browse/HDFS-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12932674#action_12932674 ] 

Hairong Kuang commented on HDFS-1483:
-------------------------------------

+1. This looks good to me.

> DFSClient.getBlockLocations returns BlockLocations with no indication that the corresponding blocks are corrupt
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-1483
>                 URL: https://issues.apache.org/jira/browse/HDFS-1483
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>            Reporter: Patrick Kling
>         Attachments: HDFS-1483.2.patch, HDFS-1483.patch
>
>
> When there are no uncorrupted replicas of a block, FSNamesystem.getBlockLocations returns LocatedBlocks corresponding to corrupt blocks. When DFSClient converts these to BlockLocations, the information that the corresponding block is corrupt is lost. We should add a field to BlockLocation to indicate whether the corresponding block is corrupt in order to warn the client that reading this block will fail. This would be especially useful for tools such as RAID FSCK, which could then easily inspect whether data or parity blocks are corrupted without having to make direct RPC calls.

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