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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