Dave Beech created MAPREDUCE-5374:
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Summary: CombineFileRecordReader does not set "map.input.*"
configuration parameters for first file read
Key: MAPREDUCE-5374
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5374
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 1.2.0
Reporter: Dave Beech
Assignee: Dave Beech
The CombineFileRecordReader operates on splits consisting of multiple files.
Each time a new record reader is initialised for a "chunk", certain parameters
are supposed to be set on the configuration object (map.input.file,
map.input.start and map.input.length)
However, the first reader is initialised in a different way to subsequent ones
(i.e. initialize is called by the MapTask directly rather than from inside the
record reader class). Because of this, these config parameters are not set
properly and are returned as null when you access them from inside a mapper.
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