startInfoServer(conf);
pauseMonitor = new JvmPauseMonitor(conf);
pauseMonitor.start();
// BlockPoolTokenSecretManager is required to create ipc server.
this.blockPoolTokenSecretManager = new BlockPoolTokenSecretManager();
initIpcServer(conf);
metrics = DataNodeMetrics.create(conf, getDisplayName());
blockPoolManager = new BlockPoolManager(this);