@BeforeClass
 public static void setUp() {
   NestedZookeeperServers.getInstance().startServerIfNotStarted(PORT, TEST_TEMP_DIRECTORY);
   zkRegCenter = new ZookeeperRegistryCenter(zkConfig);
   zkRegCenter.init();
   zkRegCenter.addCacheData("/test");
 }
 @Override
 public void beforeTestClass(final TestContext testContext) throws Exception {
   NestedZookeeperServers.getInstance().startServerIfNotStarted();
 }