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https://issues.apache.org/jira/browse/HADOOP-18029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17459478#comment-17459478
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Nicholas Chammas commented on HADOOP-18029:
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I have not contributed code to Hadoop before. Would you consider HADOOP-17562 a
loosely related issue? It proposes to enable users to explicitly specify the
input file codec to use (like they already can for output files).
If users were able to do that, they would be able to work around issues where
Hadoop does not auto-detect the correct codec to use (e.g. because the
extension is upper case). Is that correct?
> Update CompressionCodecFactory to handle uppercase file extensions
> ------------------------------------------------------------------
>
> Key: HADOOP-18029
> URL: https://issues.apache.org/jira/browse/HADOOP-18029
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common, io, test
> Environment: Tested locally on macOS 11.6.1, IntelliJ IDEA 2021.2.3,
> running maven commands through terminal. Forked from trunk branch on November
> 29th, 2021.
> Reporter: Desmond Sisson
> Assignee: Desmond Sisson
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> I've updated the CompressionCodecFactory to be able to handle filenames with
> capitalized compression extensions. Two of the three maps internal to the
> class which are used to store codecs have existing lowercase casts, but it is
> absent from the call inside getCodec() used for comparing path names.
> I updated the corresponding unit test in TestCodecFactory to include intended
> use cases, and confirmed the test passes with the change. I also updated the
> error message in the case of a null from an NPE to a rich error message. I've
> resolved all checkstyle violations within the changed files.
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