I tried to use cron expression from this site http://www.cronmaker.com/
@Scheduled(cron = "0 0/15 * 1/1 * ? *")
public void clearRps() {
}
But it throws: java.lang.IllegalStateException: Encountered invalid @Scheduled method 'clearRps': Cron expression must consist of 6 fields (found 7 in "0 0/15 * 1/1 * ? *")