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https://issues.apache.org/jira/browse/MAPREDUCE-2150?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Scott Chen updated MAPREDUCE-2150:
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Issue Type: Improvement (was: Bug)
> RaidNode should periodically fix corrupt blocks
> -----------------------------------------------
>
> Key: MAPREDUCE-2150
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2150
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/raid
> Reporter: Ramkumar Vadali
> Assignee: Ramkumar Vadali
> Attachments: MAPREDUCE-2150.2.patch, MAPREDUCE-2150.patch
>
>
> (Recreating HDFS-1171 since RAID is in mapreduce)
> RaidNode currently does not fix missing blocks. The missing blocks have to be
> fixed using RaidShell.
> This task proposes that recovery be more automated:
> 1. RaidNode periodically fetches a list of corrupt files from the NameNode
> 2. If the corrupt files can be fixed using RAID, it should generate the block.
> 3. Choose a datanode and send the block contents along with checksum to the
> datanode.
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