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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7682) {{DistributedFileSystem#getFileChecksum}} of a snapshotted file includes non-snapshotted content
Date Wed, 04 Mar 2015 02:12:04 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aaron T. Myers updated HDFS-7682:
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.7.0
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

I've just committed this to trunk and branch-2.

Thanks a lot for the contribution, Charlie, and thanks also to Jing for the reviews.

> {{DistributedFileSystem#getFileChecksum}} of a snapshotted file includes non-snapshotted
content
> ------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7682
>                 URL: https://issues.apache.org/jira/browse/HDFS-7682
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Charles Lamb
>            Assignee: Charles Lamb
>             Fix For: 2.7.0
>
>         Attachments: HDFS-7682.000.patch, HDFS-7682.001.patch, HDFS-7682.002.patch, HDFS-7682.003.patch
>
>
> DistributedFileSystem#getFileChecksum of a snapshotted file includes non-snapshotted
content.
> The reason why this happens is because DistributedFileSystem#getFileChecksum simply calculates
the checksum of all of the CRCs from the blocks in the file. But, in the case of a snapshotted
file, we don't want to include data in the checksum that was appended to the last block in
the file after the snapshot was taken.



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