報錯信息

java.lang.IllegalStateException: block()/blockFirst()/blockLast() are blocking, which is not supported in thread reactor-http-nio-3at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:83) ~[reactor-core-3.4.15.jar:3.4.15]Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: Error has been observed at the following site(s):*__checkpoint ? org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]*__checkpoint ? HTTP GET "/get" [ExceptionHandlingWebHandler]

版本：
springcloud alibaba 2021.0.1.0
springboot 2.7.0
gateway 3.1.1
openfeign 3.1.1
還原場景
網關服務通過openfeign調用授權服務

授權服務

@GetMapping("/get")public String openFeignApi(){return "asdgwe";}

網關服務

@SpringBootApplication @EnableDiscoveryClient @EnableFeignClients public class GatewayServerApplication {public static void main(String[] args) {SpringApplication.run(GatewayServerApplication.class, args);}} @Component @FeignClient(value = "oauth") public interface OauthFeign {@GetMapping("/get")String openFeignApi(); }

controller

@ResourceOauthFeign oauthFeign;@GetMapping("/get")public Object get() {return oauthFeign.openFeignApi();}

此時請求網關的/get就會報上面的錯誤。
需要添加一些配置

添加HttpMessageConverters的bean

@Configuration public class HttpMsgConverConfig {@Bean@ConditionalOnMissingBeanpublic HttpMessageConverters messageConverters(ObjectProvider<HttpMessageConverter<?>> converters) {return new HttpMessageConverters(converters.orderedStream().collect(Collectors.toList()));} }

異步調用openfeign接口,修改controller

@ResourceOauthFeign oauthFeign;@GetMapping("/get")public Object get() {CompletableFuture<Object> completableFuture = CompletableFuture.supplyAsync(() -> {return oauthFeign.openFeignApi();});return completableFuture;}

總結

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