The following changes patched the CombineFileInputFormat in mapreduce, but neglected the one in mapred
MAPREDUCE-1597 enabled the CombineFileInputFormat to work on splittable files
MAPREDUCE-2021 solved returning duplicate hostnames in split locations
MAPREDUCE-1806 CombineFileInputFormat does not work with paths not on default FS
In trunk this is not an issue as the one in mapred extends the one in mapreduce.