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Posted to mapreduce-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2013/11/26 21:02:38 UTC

[jira] [Updated] (MAPREDUCE-5656) bzip2 codec can drop records when reading data in splits

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jason Lowe updated MAPREDUCE-5656:
----------------------------------

    Attachment: MAPREDUCE-5656.patch

Cleanup work in preparation for commit.  Moving this JIRA to MAPREDUCE since it's primarily changes in that project.  Also uploading a binary patch that can be applied with git-apply as reference of what will be committed (same patch as before with binary test files added).

Awating Jenkins confirmation and commit of MAPREDUCE-5640 to avoid test name conflicts.

> bzip2 codec can drop records when reading data in splits
> --------------------------------------------------------
>
>                 Key: MAPREDUCE-5656
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5656
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.0.4-alpha, 0.23.8
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Critical
>         Attachments: HADOOP-9622-2.patch, HADOOP-9622-testcase.patch, HADOOP-9622.patch, MAPREDUCE-5656.patch, blockEndingInCR.txt.bz2, blockEndingInCRThenLF.txt.bz2
>
>
> Bzip2Codec.BZip2CompressionInputStream can cause records to be dropped when reading them in splits based on where record delimiters occur relative to compression block boundaries.
> Thanks to [~knoguchi] for discovering this problem while working on PIG-3251.



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