code: private void doTimeoutCheck(CassandraHost cassandraHost) {
      if ( hostTimeoutTracker != null && hostPools.size() > 1) {
        if (hostTimeoutTracker.checkTimeout(cassandraHost) ) {
          suspendCassandraHost(cassandraHost);
        }
      }
    }
docs: Use the HostTimeoutCheck and initiate a suspend if and only if
  we are configured for such AND there is more than one operating host pool
  @param cassandraHost