Hi all, I have a application want the rules of sorting and grouping use different Comparator.
I had tested 0.19.1 and 0.20.0 about this function, but both do not work for Combiner. In 0.19.1, I use job.setOutputValueGroupingComparator(), and in 0.20.0, I use job.setGroupingComparatorClass() This function is ok for reduce phase, the reduce phase can group the keys by above Comparator, and sort by default comparator of the key class. But I want the combiner can use a separator comparator for group, different from sorting, is it possible? Schubert
