Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.6.0:compile (default-compile) on project  dubbo-rpc-xml: Compilation failure 

dubbo\dubbo-rpc\dubbo-rpc-xml\src\main\java\org\apache\dubbo\xml\rpc\protocol\xmlrpc\XmlRpcProtocol.java:[154,4] 错误: Override 不是可重复的注释类型



} else {
                response.setStatus(500);
            }
        }
    }
    @Override
    protected <T> Runnable doExport(T impl, Class<T> type, URL url) throws RpcException {
        final URL httpUrl = url.setProtocol("http");
        String addr = httpUrl.getIp() + ":" + httpUrl.getPort();
        HttpServer server = serverMap.get(addr);
        if (server == null) {
            server = httpBinder.bind(httpUrl, new InternalHandler(httpUrl.getParameter("cors", false)));
            serverMap.put(addr, server);
        }
        final String path = httpUrl.getAbsolutePath();
        XmlRpcServletServer xmlRpcServer = new XmlRpcServletServer();
        PropertyHandlerMapping propertyHandlerMapping = new PropertyHandlerMapping();
        try {
            propertyHandlerMapping.setRequestProcessorFactoryFactory(new RequestProcessorFactoryFactory(){
                @Override
                public RequestProcessorFactory getRequestProcessorFactory(Class pClass) throws XmlRpcException{
                    return new RequestProcessorFactory(){
                        @Override
                        public Object getRequestProcessor(XmlRpcRequest pRequest) throws XmlRpcException{
                            return impl;
                        }
                    };
                }
            });
            propertyHandlerMapping.addHandler(XmlRpcProxyFactoryBean.replace(type.getName()),type);