// flapping time window to 5 sec
System.setProperty("helixmanager.flappingTimeWindow", "5000");
System.setProperty("helixmanager.maxDisconnectThreshold", "3");
ClusterControllerManager manager2 = new ClusterControllerManager(ZK_ADDR, clusterName, null);
manager2.connect();
Thread.sleep(100);
ZkClient zkClient = manager2.getZkClient();
for (int i = 0; i < 2; i++) {
ZkTestHelper.expireSession(zkClient);
Thread.sleep(500);