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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5720) HFileDataBlockEncoderImpl uses wrong header size when reading HFiles with no checksums
Date Sun, 08 Apr 2012 00:46:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13249437#comment-13249437
] 

Lars Hofhansl commented on HBASE-5720:
--------------------------------------

Let's move all followup discussions into HBASE-5746
                
> HFileDataBlockEncoderImpl uses wrong header size when reading HFiles with no checksums
> --------------------------------------------------------------------------------------
>
>                 Key: HBASE-5720
>                 URL: https://issues.apache.org/jira/browse/HBASE-5720
>             Project: HBase
>          Issue Type: Bug
>          Components: io, regionserver
>    Affects Versions: 0.94.0
>            Reporter: Matt Corgan
>            Assignee: Matt Corgan
>            Priority: Blocker
>             Fix For: 0.94.0
>
>         Attachments: 5720-trunk-v2.txt, 5720-trunk.txt, 5720v4.txt, 5720v4.txt, 5720v4.txt,
HBASE-5720-v1.patch, HBASE-5720-v2.patch, HBASE-5720-v3.patch
>
>
> When reading a .92 HFile without checksums, encoding it, and storing in the block cache,
the HFileDataBlockEncoderImpl always allocates a dummy header appropriate for checksums even
though there are none.  This corrupts the byte[].
> Attaching a patch that allocates a DUMMY_HEADER_NO_CHECKSUM in that case which I think
is the desired behavior.

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