/** Creates the RunsMerger and the RunIteratorFactory */
protected RunsMerger createtheRunMerger() {
//logger.info("creating run merged with fields="+useFieldInformation);
runIteratorF =
new HadoopRunIteratorFactory(null,
(useFieldInformation
? FieldPostingInRun.class
: SimplePostingInRun.class),
super.numFields);
HadoopRunsMerger tempRM = new HadoopRunsMerger(runIteratorF);