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Posted to mapreduce-issues@hadoop.apache.org by "Ramkumar Vadali (JIRA)" <ji...@apache.org> on 2011/06/06 22:18:59 UTC

[jira] [Created] (MAPREDUCE-2570) Bug in RAID FS (DistributedRaidFileSystem) unraid path

Bug in RAID FS (DistributedRaidFileSystem) unraid path
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                 Key: MAPREDUCE-2570
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2570
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: contrib/raid
            Reporter: Ramkumar Vadali
            Assignee: Ramkumar Vadali


The "un-raid" path in DistributedRaidFileSystem goes through RaidNode.unRaidCorruptBlock(), which has a bug when the parity file is inside a HAR. The temporary file that contains the recovered block contents is created in the filesystem that hosts the parity file. In case the parity file is inside a HAR, its filesystem is HarFileSystem, which is read-only. In this case the temporary file creation will fail. The fix is a one-line change to use the underlying filesystem of the HAR.

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