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https://issues.apache.org/jira/browse/MAPREDUCE-6751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15423234#comment-15423234
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Ray Chiang commented on MAPREDUCE-6751:
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+1. Looks like a very useful message to me. Committing...
> Print a log message, when splitting is not possible because of an
> unsplittable compression
> ------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-6751
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6751
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: client, mrv1, mrv2
> Affects Versions: 3.0.0-alpha1
> Reporter: Peter Vary
> Assignee: Peter Vary
> Priority: Minor
> Labels: supportability
> Attachments: MAPREDUCE-6751.2.patch, MAPREDUCE-6751.patch
>
>
> There should be a message logged in case of the mapreduce will only spam one
> mapper since the source file is compressed with an unsplitable algorithm
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