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Posted to common-issues@hadoop.apache.org by "David Ciemiewicz (JIRA)" <ji...@apache.org> on 2010/04/06 23:53:33 UTC

[jira] Updated: (HADOOP-6335) Support reading of concatenated gzip and bzip2 files

     [ https://issues.apache.org/jira/browse/HADOOP-6335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Ciemiewicz updated HADOOP-6335:
-------------------------------------

    Summary: Support reading of concatenated gzip and bzip2 files  (was: Support reading of concatenated gzip files)

bzip2 also supports concatenation of individually compressed files.

bzcat has absolutely no problem reading all of the data in a single concatenated file.

Unfortuantely, M/R loses records.  My Hadoop Streaming and Pig jobs saw only 2% of the data in the concatenated file.  That's a 98% data loss.  Not very good.  There should be no data loss in reading these concatenated files.

> Support reading of concatenated gzip and bzip2 files
> ----------------------------------------------------
>
>                 Key: HADOOP-6335
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6335
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Ravi Gummadi
>            Assignee: Ravi Gummadi
>
> GzipCodec.GzipInputStream needs to support reading of concatenated gzip files.

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