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Posted to common-issues@hadoop.apache.org by "Lianhui Wang (JIRA)" <ji...@apache.org> on 2010/12/29 16:31:49 UTC

[jira] Commented: (HADOOP-6714) FsShell 'hadoop fs -text' does not support compression codecs

    [ https://issues.apache.org/jira/browse/HADOOP-6714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12975803#action_12975803 ] 

Lianhui Wang commented on HADOOP-6714:
--------------------------------------

that 's great. but if a uncompressed that  the first character of it is  the same as the header of compressed files, that is a error.
in addition, can we use FileOutputSteam  instead of stdout？

> FsShell 'hadoop fs -text' does not support compression codecs
> -------------------------------------------------------------
>
>                 Key: HADOOP-6714
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6714
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Patrick Angeles
>            Assignee: Patrick Angeles
>         Attachments: hadoop-6714-20-1.patch, HADOOP-6714.patch
>
>
> Currently, 'hadoop fs -text myfile' looks at the first few magic bytes of a file to determine whether it is gzip compressed or a sequence file. This means 'fs -text' cannot properly decode .deflate or .bz2 files (or other codecs specified via configuration).
> It should be fairly straightforward to add support for other codecs by checking the file extension against the CompressionCodecFactory to retrieve an appropriate Codec.

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