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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