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https://issues.apache.org/jira/browse/HADOOP-1124?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hairong Kuang updated HADOOP-1124:
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Fix Version/s: (was: 0.13.0)
0.14.0
> ChecksumFileSystem does not handle ChecksumError correctly
> ----------------------------------------------------------
>
> Key: HADOOP-1124
> URL: https://issues.apache.org/jira/browse/HADOOP-1124
> Project: Hadoop
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.12.0
> Reporter: Hairong Kuang
> Assigned To: Hairong Kuang
> Fix For: 0.14.0
>
>
> When handle ChecksumError, the checksumed file system tries to recover by
> rereading from a different replica.
> I have three comments:
> 1. One bug in the code is that when retrying, the object that computes
> checksum does not get restored to the old state.
> 2. The code also assumes that the first byte read and the byte being read
> when ChecksumError occurs are in the same block.
> 3. It would be more efficient if we roll back to the first byte in the chunk
> that's being checksumed instead of rolling back to the first byte that was
> read.
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