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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5656) bzip2 codec can drop records when reading data in splits
Date Tue, 10 Dec 2013 13:40:12 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13844269#comment-13844269
] 

Hudson commented on MAPREDUCE-5656:
-----------------------------------

SUCCESS: Integrated in Hadoop-Hdfs-trunk #1608 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1608/])
MAPREDUCE-5656. bzip2 codec can drop records when reading data in splits. Contributed by Jason
Lowe (jlowe: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1549705)
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/LineReader.java
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/LineRecordReader.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/CompressedSplitLineReader.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/SplitLineReader.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapred/TestLineRecordReader.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/lib/input/TestLineRecordReader.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/resources/blockEndingInCR.txt.bz2
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/resources/blockEndingInCRThenLF.txt.bz2


> 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
>             Fix For: 3.0.0, 2.4.0
>
>         Attachments: HADOOP-9622-2.patch, HADOOP-9622-testcase.patch, HADOOP-9622.patch,
MAPREDUCE-5656-2.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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