Sentinel整合Dubbo统一异常处理不生效

Question

Sentinel在整合Dubbo的时候，如何在Provider端进行全局统一处理BlockException流控异常

@Component
public class CustomerUrlBlockHandler implements BlockExceptionHandler {

    @Override
    public void handle(HttpServletRequest request, HttpServletResponse response, BlockException e) throws Exception {
        String msg = "";
        if (e instanceof FlowException) {
            msg = "限流了,请稍后再试";
        } else if (e instanceof DegradeException) {
            msg = "降级了,请稍后再试";
        } else if (e instanceof ParamFlowException) {
            msg = "热点参数限流,请稍后再试";
        } else if (e instanceof SystemBlockException) {
            msg = "系统规则(负载、、...)不满足规则";
        } else if (e instanceof AuthorityException) {
            msg = "授权规则不通过";
        }

        response.setContentType("application/json;charset=UTF-8");
        response.setStatus(500);
        response.getWriter().print(JSONObject.toJSONString(msg));
    }

}

该配置放在消费者端可以生效，但是在生产者端并不会生效，为啥呀？