[MAPREDUCE-5069] add concrete common implementations of CombineFileInputFormat

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.3-alpha
• Fix Version/s: 2.1.0-beta
• Component/s: mrv1, mrv2
• Target Version/s: 2.1.0-beta
• Assignee: Sangjin Lee
• Reporter: Sangjin Lee
• Created: 14/Mar/13 21:04
• Updated: 03/Sep/14 22:45
• Resolved: 24/Apr/13 14:24

Description

CombineFileInputFormat is abstract, and its specific equivalents to TextInputFormat, SequenceFileInputFormat, etc. are currently not in the hadoop code base.

These sound like very common need wherever CombineFileInputFormat is used, and different folks would write the same code over and over to achieve the same goal. It sounds very natural for hadoop to provide at least the text and sequence file implementations of the CombineFileInputFormat class.