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Posted to mapreduce-dev@hadoop.apache.org by "Zheng Shao (JIRA)" <ji...@apache.org> on 2010/03/30 20:36:27 UTC
[jira] Created: (MAPREDUCE-1649) Compressed files with
TextInputFormat does not work with CombineFileInputFormat
Compressed files with TextInputFormat does not work with CombineFileInputFormat
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Key: MAPREDUCE-1649
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1649
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.20.2
Reporter: Zheng Shao
Assignee: Zheng Shao
{{CombineFileInputFormat}} creates splits based on blocks, regardless whether the underlying {{FileInputFormat}} is splittable or not..
This means that we can have 2 or more splits for a compressed text file with {{TextInputFormat}}. For each of these splits, {{TextInputFormat.getRecordReader}} will return a {{RecordReader}} for the whole compressed file, thus causing duplicate input data.
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[jira] Resolved: (MAPREDUCE-1649) Compressed files with
TextInputFormat does not work with CombineFileInputFormat
Posted by "Amareshwari Sriramadasu (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-1649?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Amareshwari Sriramadasu resolved MAPREDUCE-1649.
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Resolution: Invalid
Resolving this as MAPREDUCE-1597 fixes compressed files in CombineFileInputFormat.
> Compressed files with TextInputFormat does not work with CombineFileInputFormat
> -------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1649
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1649
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 0.20.2
> Reporter: Zheng Shao
> Assignee: Zheng Shao
> Attachments: MAPREDUCE-1649.1.branch-0.20.patch
>
>
> {{CombineFileInputFormat}} creates splits based on blocks, regardless whether the underlying {{FileInputFormat}} is splittable or not..
> This means that we can have 2 or more splits for a compressed text file with {{TextInputFormat}}. For each of these splits, {{TextInputFormat.getRecordReader}} will return a {{RecordReader}} for the whole compressed file, thus causing duplicate input data.
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