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Posted to common-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2016/04/22 16:58:12 UTC

[jira] [Created] (HADOOP-13052) ChecksumFileSystem mishandles crc file permissions

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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