fillStatMap("290", "2000");
assertTrue(statsPublisher.publishStat("file_00000_b", stats));
// update that should take effect
fillStatMap("500", "5000");
assertTrue(statsPublisher.publishStat("file_00001_a", stats));
fillStatMap("600", "6000");
assertTrue(statsPublisher.publishStat("file_00001_b", stats));
// aggregate existing stats
String rows0 = statsAggregator.aggregateStats("file_00000", StatsSetupConst.ROW_COUNT);