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Date: Fri, 27 Jan 2012 22:48:10 +0000 (UTC)
From: "Ravi Prakash (Updated) (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Updated] (HDFS-2848) hdfs corruption appended to blocks is
 not detected by fs commands or fsck
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     [ https://issues.apache.org/jira/browse/HDFS-2848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ravi Prakash updated HDFS-2848:
-------------------------------

    Description: 
Courtesy Pat White [~patwhitey2007]
{quote}
Appears that there is a regression in corrupt block detection by both fsck and fs cmds like 'cat'. Testcases for
pre-block and block-overwrite corruption of all replicas is correctly reporting errors however post-block corruption is
not, fsck on the filesystem reports it's Healthy and 'cat' returns without error. Looking at the DN blocks themselves,
they clearly contain the injected corruption pattern.
{quote}

  was:
Courtesy Pat White
{quote}
Appears that there is a regression in corrupt block detection by both fsck and fs cmds like 'cat'. Testcases for
pre-block and block-overwrite corruption of all replicas is correctly reporting errors however post-block corruption is
not, fsck on the filesystem reports it's Healthy and 'cat' returns without error. Looking at the DN blocks themselves,
they clearly contain the injected corruption pattern.
{quote}

    
> hdfs corruption appended to blocks is not detected by fs commands or fsck
> -------------------------------------------------------------------------
>
>                 Key: HDFS-2848
>                 URL: https://issues.apache.org/jira/browse/HDFS-2848
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.23.0
>            Reporter: Ravi Prakash
>            Assignee: Ravi Prakash
>
> Courtesy Pat White [~patwhitey2007]
> {quote}
> Appears that there is a regression in corrupt block detection by both fsck and fs cmds like 'cat'. Testcases for
> pre-block and block-overwrite corruption of all replicas is correctly reporting errors however post-block corruption is
> not, fsck on the filesystem reports it's Healthy and 'cat' returns without error. Looking at the DN blocks themselves,
> they clearly contain the injected corruption pattern.
> {quote}

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