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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