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https://issues.apache.org/jira/browse/HADOOP-8570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13686154#comment-13686154
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Emīls Šolmanis commented on HADOOP-8570:
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Hey guys
I'd be willing to do this, which of the approaches though? I think just
changing the extension to .bz wouldn't solve this bug 'cause it wouldn't take
.bz2 files, which, apart from being this same bug with another extension, would
be incompatible.
>From what I see, the changes are contained to {{CompressionCodecFactory}} (and
>2 logging statements in {{CodecPool}}). The idea then is to change the
>{{CompressionCodec}} interface, specifically {{getDefaultExtension()}} and the
>mechanism pertaining to it to return a set of extensions the codec supports.
>Also, looks like at the moment there are no checks for extension overlays, so
>if there are two codecs that report the same extension, one would overwrite
>another as they get loaded by the {{ServiceLoader}}. I think at the very least
>this calls for a loud warning in the log, especially if we add this extension
>aliasing thing.
Your thoughts? Should I go ahead & make a patch for this?
> Bzip2Codec should accept .bz files too
> --------------------------------------
>
> Key: HADOOP-8570
> URL: https://issues.apache.org/jira/browse/HADOOP-8570
> Project: Hadoop Common
> Issue Type: Improvement
> Components: io
> Affects Versions: 1.0.0, 2.0.0-alpha
> Reporter: Harsh J
> Labels: bzip, newbie
>
> The default extension reported for Bzip2Codec today is ".bz2". This causes it
> not to pick up .bz files as Bzip2Codec files. Although the extension is not
> very popular today, it is still mentioned as a valid extension in the bunzip
> manual and we should support it.
> We should change the Bzip2Codec default extension to "bz", or we should add
> in a new extension list support to allow for better detection across various
> aliases.
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