Assert.assertTrue(_callback._isCallbackInvoked);
_callback._isCallbackInvoked = false;
// add a new live instance
ZkClient zkClient = new ZkClient(ZK_ADDR);
zkClient.setZkSerializer(new ZNRecordSerializer());
ZKHelixDataAccessor accessor = new ZKHelixDataAccessor(_clusterName, new ZkBaseDataAccessor(zkClient));
Builder keyBuilder = accessor.keyBuilder();
LiveInstance newLiveIns = new LiveInstance("newLiveInstance");
newLiveIns.setHelixVersion("0.0.0");