private void initialize(String address, Configuration conf) throws IOException {

   InetSocketAddress socAddr = NameNode.getAddress(address);

   this.supportAppends = conf.getBoolean("dfs.support.append", true);

   this.handlerCount = conf.getInt("dfs.namenode.handler.count", 10);

   this.server = RPC.getServer(this, socAddr.getHostName(), socAddr.getPort(),handlerCount, false, conf);



   this.nameNodeAddress = this.server.getListenerAddress();

   FileSystem.setDefaultUri(conf, getUri(nameNodeAddress));

   LOG.info("Namenode up at: " + this.nameNodeAddress);



   myMetrics = new NameNodeMetrics(conf, this);



   this.namesystem = new FSNamesystem(this, conf);

   this.server.start();  //start RPC server



   this.emptier = new Thread(new Trash(conf).getEmptier(), "Trash Emptier");

   this.emptier.setDaemon(true);

   this.emptier.start();

}