this.isSecurityEnabled = UserGroupInformation.isSecurityEnabled();
// Start the listener here and let it bind to the port
listener = new Listener();
this.port = listener.getAddress().getPort();
this.rpcMetrics = new RpcMetrics(serverName,
Integer.toString(this.port), this);
this.rpcDetailedMetrics = new RpcDetailedMetrics(serverName,
Integer.toString(this.port));
this.tcpNoDelay = conf.getBoolean("ipc.server.tcpnodelay", false);