public void receive(ClusterMetrics ncs) {
    if (ncs.getDeadServerNames() != null) {
      for (ServerName sn : ncs.getDeadServerNames()) {
        if (!isDeadServer(sn)) {
          LOG.info("There is a new dead server: " + sn);
          deadServers.add(sn);
          if (deadServerHandler != null) {
            deadServerHandler.newDead(sn);
          }
        }
      }
    }
  }
Acts upon the reception of a new cluster status.
@param ncs the cluster status
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClusterStatusListener.java