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https://issues.apache.org/jira/browse/HADOOP-13052?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HADOOP-13052:
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Resolution: Fixed
Hadoop Flags: Reviewed
Fix Version/s: 2.7.3
Status: Resolved (was: Patch Available)
Committed to trunk through 2.7. Thanks for fixing this Daryn.
> ChecksumFileSystem mishandles crc file permissions
> --------------------------------------------------
>
> Key: HADOOP-13052
> URL: https://issues.apache.org/jira/browse/HADOOP-13052
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.7.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Fix For: 2.7.3
>
> Attachments: HADOOP-13052.patch
>
>
> CheckFileSystem does not override permission related calls to apply those
> operations to the hidden crc files. Clients may be unable to read the crcs
> if the file is created with strict permissions and then relaxed.
> The checksum fs is designed to work with or w/o crcs present, so it silently
> ignores FNF exceptions. The java file stream apis unfortunately may only
> throw FNF, so permission denied becomes FNF resulting in this bug going
> silently unnoticed.
> (Problem discovered via public localizer. Files are downloaded as
> user-readonly and then relaxed to all-read. The crc remains user-readonly)
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