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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5605) All the replicas incorrectly got marked as corrupt.
Date Wed, 01 Apr 2009 00:39:50 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Raghu Angadi updated HADOOP-5605:
---------------------------------

    Description: 
NameNode does not handle {{reportBadBlocks()}} properly. As a result, when DataNode reports
the corruption (only in the case of block transfer between two datanodes), further attempts
to replicate the block end up marking all the replicas as corrupt!

>From the implementation, it looks like NN incorrectly uses the block object used in RPC
to queue to neededReplication queue instead of using internal block object. 

will include an actual example in the next comment.


  was:

NameNode does not handle {{reportBadBlocks()}} properly. As a result, when DataNode reports
the corruption (only in the case of block transfer between two datanodes), further attempts
to replicate the block end up marking all the replicas as corrupt!

>From the implementation, it looks like NN incorrectly uses the block object used in RPC
to queue to neededReplication queue instead of using internal block object. 

will include an actual example in the next comment.


       Priority: Blocker  (was: Major)

> All the replicas incorrectly got marked as corrupt.
> ---------------------------------------------------
>
>                 Key: HADOOP-5605
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5605
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.20.0
>            Reporter: Raghu Angadi
>            Priority: Blocker
>             Fix For: 0.2.0
>
>
> NameNode does not handle {{reportBadBlocks()}} properly. As a result, when DataNode reports
the corruption (only in the case of block transfer between two datanodes), further attempts
to replicate the block end up marking all the replicas as corrupt!
> From the implementation, it looks like NN incorrectly uses the block object used in RPC
to queue to neededReplication queue instead of using internal block object. 
> will include an actual example in the next comment.

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