code: private int getBloomFilterFlushHourToStartAt() {
  		int bloomFilterFlushHourToStartAt = 0;
  		try {
  			bloomFilterFlushHourToStartAt = Math.abs(InetAddress.getLocalHost().getHostName().hashCode() % 24);
  		} catch (UnknownHostException e) {
  			_logger.warn("BloomFilter UnknownHostException", e);
  		}
  		_logger.info("BloomFilter flush hour to start at {}th hour of day", bloomFilterFlushHourToStartAt);
  		return bloomFilterFlushHourToStartAt;
  	}
docs: /*
  Have a different flush start hour for schema committers based on hostname, to prevent thundering herd problem.