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



private boolean cors;
        public InternalHandler(boolean cors) {
            this.cors = cors;
        }
        @Override
        public void handle(HttpServletRequest request, HttpServletResponse response)
                throws IOException, ServletException {
            String uri = request.getRequestURI();
            XmlRpcServletServer xmlrpc = skeletonMap.get(uri);
            if (cors) {
                response.setHeader(ACCESS_CONTROL_ALLOW_ORIGIN_HEADER, "*");
                response.setHeader(ACCESS_CONTROL_ALLOW_METHODS_HEADER, "POST");
                response.setHeader(ACCESS_CONTROL_ALLOW_HEADERS_HEADER, "*");
            }
            if (request.getMethod().equalsIgnoreCase("OPTIONS")) {
                response.setStatus(200);
            } else if (request.getMethod().equalsIgnoreCase("POST")) {
                RpcContext.getContext().setRemoteAddress(request.getRemoteAddr(), request.getRemotePort());
                try {
                    xmlrpc.execute (request,response);
                } catch (Throwable e) {
                    throw new ServletException(e);
                }