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From "Greg Roelofs (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6835) Support concatenated gzip and bzip2 files
Date Wed, 23 Jun 2010 02:33:53 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12881522#action_12881522
] 

Greg Roelofs commented on HADOOP-6835:
--------------------------------------

(This was MAPREDUCE-469, but Chris Douglas noted that it affects the core compression code
in hadoop-common, not hadoop-mapreduce, so moved here now.)

> Support concatenated gzip and bzip2 files
> -----------------------------------------
>
>                 Key: HADOOP-6835
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6835
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>            Reporter: Tom White
>            Assignee: Greg Roelofs
>         Attachments: grr-hadoop-common.dif.20100614c, grr-hadoop-mapreduce.dif.20100614c,
MR-469.v2.yahoo-0.20.2xx-branch.patch
>
>
> When running MapReduce with concatenated gzip files as input only the first part is read,
which is confusing, to say the least. Concatenated gzip is described in http://www.gnu.org/software/gzip/manual/gzip.html#Advanced-usage
and in http://www.ietf.org/rfc/rfc1952.txt. (See original report at http://www.nabble.com/Problem-with-Hadoop-and-concatenated-gzip-files-to21383097.html)

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