I'm referring to what CombineFileInputFormat does here: https://github.com/apache/hadoop-common/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/CombineFileInputFormat.java#L293

At least it seems to me that the proposed pull request would not leverage that feature as is and/or it would do it in a different fashion? A quick summary on how it is different? Thanks...