@Override
  public String getDatacenterName(byte id) {
    String helixDcName = helixClusterManager.getDatacenterName(id);
    if (check) {
      if (!helixDcName.equals(staticClusterManager.getDatacenterName(id))) {
        logger.debug("Static DC name does not match Helix DC name");
        helixClusterManagerMetrics.getDatacenterNameMismatchCount.inc();
      }
    }
    return helixDcName;
  }
Check for existence of the given datacenter from both the static and the helix based cluster managers and update
a metric if there is a mismatch.
@param datacenterName name of datacenter
@return true if the datacenter exists in the underlying {@link StaticClusterManager}; false otherwise.
ambry-clustermap/src/main/java/com/github/ambry/clustermap/CompositeClusterManager.java