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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6549) multibyte delimiters with LineRecordReader cause duplicate records
Date Thu, 26 Nov 2015 05:21:11 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15028188#comment-15028188
] 

Hudson commented on MAPREDUCE-6549:
-----------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #2668 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2668/])
MAPREDUCE-6549. multibyte delimiters with LineRecordReader cause (rkanter: rev 7fd00b3db4b7d73afd41276ba9a06ec06a0e1762)
* hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/LineReader.java
* hadoop-mapreduce-project/CHANGES.txt
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/UncompressedSplitLineReader.java
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/lib/input/TestLineRecordReader.java
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapred/TestLineRecordReader.java


> multibyte delimiters with LineRecordReader cause duplicate records
> ------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6549
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6549
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv1, mrv2
>    Affects Versions: 2.7.2
>            Reporter: Dustin Cote
>            Assignee: Wilfred Spiegelenburg
>             Fix For: 2.8.0
>
>         Attachments: MAPREDUCE-6549-1.patch, MAPREDUCE-6549-2.patch, MAPREDUCE-6549.3.patch
>
>
> LineRecorderReader currently produces duplicate records under certain scenarios such
as:
> 1) input string: "abc+++def++ghi++" 
> delimiter string: "+++" 
> test passes with all sizes of the split 
> 2) input string: "abc++def+++ghi++" 
> delimiter string: "+++" 
> test fails with a split size of 4 
> 2) input string: "abc+++def++ghi++" 
> delimiter string: "++" 
> test fails with a split size of 5 
> 3) input string "abc+++defg++hij++" 
> delimiter string: "++" 
> test fails with a split size of 4 
> 4) input string "abc++def+++ghi++" 
> delimiter string: "++" 
> test fails with a split size of 9 



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