private void combineAndSpill(RawKeyValueIterator kvIter, Counters.Counter inCounter)
throws IOException {
JobConf job = jobConf;
Reducer combiner = ReflectionUtils.newInstance(combinerClass, job);
Class<K> keyClass = (Class<K>) job.getMapOutputKeyClass();
Class<V> valClass = (Class<V>) job.getMapOutputValueClass();
RawComparator<K> comparator = (RawComparator<K>) job.getCombinerKeyGroupingComparator();
try {
CombineValuesIterator values =
new CombineValuesIterator(
kvIter, comparator, keyClass, valClass, job, Reporter.NULL, inCounter);
while (values.more()) {
combiner.reduce(values.getKey(), values, combineCollector, Reporter.NULL);
values.nextKey();
}
} finally {
combiner.close();
}
}
