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From "Ramkumar Vadali (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-2150) RaidNode should periodically fix corrupt blocks
Date Mon, 25 Oct 2010 20:44:21 GMT
RaidNode should periodically fix corrupt blocks
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                 Key: MAPREDUCE-2150
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2150
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: contrib/raid
            Reporter: Ramkumar Vadali
            Assignee: Ramkumar Vadali


(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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