Daryn Sharp created HADOOP-13052:
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Summary: 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
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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