@Before
    public void init() {
        server = new BoltServer(port, true);
        server.start();
        server.addConnectionEventProcessor(ConnectionEventType.CONNECT, serverConnectProcessor);
        server.addConnectionEventProcessor(ConnectionEventType.CLOSE, serverDisConnectProcessor);
        server.registerUserProcessor(serverUserProcessor);

        client = new RpcClient();
        client.addConnectionEventProcessor(ConnectionEventType.CONNECT, clientConnectProcessor);
        client.addConnectionEventProcessor(ConnectionEventType.CLOSE, clientDisConnectProcessor);
        client.registerUserProcessor(clientUserProcessor);
        client.startup();
    }
test async send back exception

@author welkin.xu
src/test/java/com/alipay/remoting/rpc/exception/BasicUsage_AsyncProcessor_ExceptionV2_Test.java