default Mono<Void> error(ServerWebExchange exchange) {
        exchange.getResponse().setStatusCode(HttpStatus.INTERNAL_SERVER_ERROR);
        Object error = ShenyuResultWrap.error(exchange, ShenyuResultEnum.SERVICE_RESULT_ERROR);
        return WebFluxResultUtils.result(exchange, error);
    }
default error.

@param exchange the exchange
@return Mono
shenyu-plugin/shenyu-plugin-fault-tolerance/shenyu-plugin-resilience4j/src/main/java/org/apache/shenyu/plugin/resilience4j/executor/Executor.java