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https://issues.apache.org/jira/browse/MAPREDUCE-5049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13596117#comment-13596117
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Tom White commented on MAPREDUCE-5049:
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+1
> CombineFileInputFormat counts all compressed files non-splitable
> ----------------------------------------------------------------
>
> Key: MAPREDUCE-5049
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5049
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 1.1.1
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Attachments: MAPREDUCE-5049.patch
>
>
> In branch-1, CombineFileInputFormat doesn't take SplittableCompressionCodec
> into account and thinks that all compressible input files aren't splittable.
> This is a regression from when handling for non-splitable compression codecs
> was originally added in MAPREDUCE-1597, and seems to have somehow gotten in
> when the code was pulled from 0.22 to branch-1.
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