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https://issues.apache.org/jira/browse/MAPREDUCE-6549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15033565#comment-15033565
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Junping Du commented on MAPREDUCE-6549:
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Hi [~wilfreds], [~rkanter] and [~jlowe], I noticed that MAPREDUCE-6558
(compressed version) is still open. Do we think this patch could go
independently to 2.6.3 or better to be combined with MAPREDUCE-6558 to 2.6.4?
> 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, 2.6.3, 2.7.3
>
> 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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