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https://issues.apache.org/jira/browse/HADOOP-8449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13285850#comment-13285850
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Joey Echeverria commented on HADOOP-8449:
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Yup. I'm cool with using extensions, but after we check for SEQ. Today, it's
reversed. It checks the extension before checking for the magic header.
> hadoop fs -text fails with compressed sequence files with the codec file
> extension
> ----------------------------------------------------------------------------------
>
> Key: HADOOP-8449
> URL: https://issues.apache.org/jira/browse/HADOOP-8449
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 1.0.3, 2.0.0-alpha
> Reporter: Joey Echeverria
> Priority: Minor
>
> When the -text command is run on a file and the file ends in the default
> extension for a codec (e.g. snappy or gz), but is a compressed sequence file,
> the command will fail.
> The issue is that it assumes that if it matches the extension, then it's
> plain compressed file. It might be more helpful to check if it's a sequence
> file first, and then check the file extension second.
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