get index offset for a particular reducer . concode_field_sep LongBuffer offsets concode_field_sep placeholderType placeHolder
ShuffleIndexRecord function ( int arg0 ) { long loc0 = offsets . get ( arg0 ) ; long loc1 = offsets . get ( arg0 + 1 ) ; return new ShuffleIndexRecord ( loc0 , loc1 - loc0 ) ; }