@BeforeClass
    public static void adBeforeClass() {
        RpcRunningState.setUnitTestMode(true);

        try {
            server = new TestingServer(2181, true);
            server.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
@author <a href=mailto:leizhiyuan@gmail.com>leizhiyuan</a>
test/test-integration-3rd/src/test/java/com/alipay/sofa/rpc/registry/base/BaseZkTest.java