code: @Override
    public Set<CassandraHost> getKnownPoolHosts(boolean refresh) {
      if (refresh || knownPoolHosts == null) {
        knownPoolHosts = connectionManager.getHosts();
        if ( log.isInfoEnabled() ) {
          log.info("found knownPoolHosts: {}", knownPoolHosts);
        }
      }
      return knownPoolHosts;
    }
docs: /* (non-Javadoc)
  @see me.prettyprint.cassandra.service.Cluster#getKnownPoolHosts(boolean)