DFSClient.getBlockLocations returns BlockLocations with no indication that the
corresponding blocks are corrupt
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Key: HDFS-1483
URL: https://issues.apache.org/jira/browse/HDFS-1483
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Patrick Kling
When there are no uncorrupted replicas of a block,
FSNamesystem.getBlockLocations returns LocatedBlocks corresponding to corrupt
blocks. When DFSClient converts these to BlockLocations, the information that
the corresponding block is corrupt is lost. We should add a field to
BlockLocation to indicate whether the corresponding block is corrupt in order
to warn the client that reading this block will fail. This would be especially
useful for tools such as RAID FSCK, which could then easily inspect whether
data or parity blocks are corrupted without having to make direct RPC calls.
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