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https://issues.apache.org/jira/browse/MAPREDUCE-469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879160#action_12879160
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David Ciemiewicz commented on MAPREDUCE-469:
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Greg, I have yet to encounter ANYONE who doesn't consider this a bug because
all cited reference EXPECT concatenated files to work because the work in ALL
OTHER cited instances including gnu tools, web browsers, etc. Can you think of
a single instance where it would be the right thing to stop reading a
concatenated file after the first part is read, ignoring all other concatenated
parts. Forgive me but suggesting that we keep the existing behavior seems
absurd because I cannot think of a single case where this would be the right
thing to do.
> Support concatenated gzip and bzip2 files
> -----------------------------------------
>
> Key: MAPREDUCE-469
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-469
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Tom White
> Assignee: Greg Roelofs
> Attachments: grr-hadoop-common.dif.20100614c,
> grr-hadoop-mapreduce.dif.20100614c
>
>
> 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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