Could not find class [org.springframework.boot.autoconfigure.condition.OnPropertyCondition]【问题解决】

报错

Could not find class [org.springframework.boot.autoconfigure.condition.OnPropertyCondition]
java.lang.IllegalArgumentException: Could not find class [org.springframework.boot.autoconfigure.condition.OnPropertyCondition]
	at org.springframework.util.ClassUtils.resolveClassName(ClassUtils.java:334)
	at org.springframework.context.annotation.ConditionEvaluator.getCondition(ConditionEvaluator.java:124)
	at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:96)
	at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:88)
	at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:71)
	at org.springframework.context.annotation.AnnotatedBeanDefinitionReader.doRegisterBean(AnnotatedBeanDefinitionReader.java:254)
	at org.springframework.context.annotation.AnnotatedBeanDefinitionReader.registerBean(AnnotatedBeanDefinitionReader.java:147)
	at org.springframework.context.annotation.AnnotatedBeanDefinitionReader.register(AnnotatedBeanDefinitionReader.java:137)
	at org.springframework.context.annotation.AnnotationConfigApplicationContext.register(AnnotationConfigApplicationContext.java:162)
	at org.springframework.cloud.context.named.NamedContextFactory.createContext(NamedContextFactory.java:120)
	at org.springframework.cloud.context.named.NamedContextFactory.getContext(NamedContextFactory.java:102)
	at org.springframework.cloud.netflix.ribbon.SpringClientFactory.getContext(SpringClientFactory.java:131)
	at org.springframework.cloud.context.named.NamedContextFactory.getInstance(NamedContextFactory.java:146)
	at org.springframework.cloud.netflix.ribbon.SpringClientFactory.getInstance(SpringClientFactory.java:121)
	at org.springframework.cloud.netflix.ribbon.SpringClientFactory.getLoadBalancer(SpringClientFactory.java:65)
	at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.getLoadBalancer(RibbonLoadBalancerClient.java:193)
	at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(RibbonLoadBalancerClient.java:88)
	at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(RibbonLoadBalancerClient.java:78)
	at org.springframework.cloud.client.loadbalancer.reactive.LoadBalancerExchangeFilterFunction.filter(LoadBalancerExchangeFilterFunction.java:63)
	at org.springframework.cloud.client.loadbalancer.reactive.DeferringLoadBalancerExchangeFilterFunction.filter(DeferringLoadBalancerExchangeFilterFunction.java:51)
	at org.springframework.web.reactive.function.client.ExchangeFilterFunction.lambda$apply$2(ExchangeFilterFunction.java:68)
	at org.springframework.web.reactive.function.client.DefaultWebClient$DefaultRequestBodyUriSpec.lambda$exchange$0(DefaultWebClient.java:338)
	at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:44)
	at reactor.core.publisher.Mono.subscribe(Mono.java:4252)
	at reactor.core.publisher.Mono.subscribeWith(Mono.java:4363)

原因使用 CompletableFuture.runAsync 调用 webClient，RibbonLoadBalancerClient组件报错

// SpringCloud 2.2.9 版本

CompletableFuture.runAsync(()->{
	...
	
	webClient.post()
	                        .uri(targetUrl)
	                        .contentType(MediaType.APPLICATION_JSON)
	                        .bodyValue(...)
	                        .retrieve()
	                        .bodyToMono(String.class)
	                        ...
	                        .subscribe();
})

解决: 使用 thread 替换，或者直接升级SpringCloud 版本

            Thread thread = new Thread(()->{
				webClient.post()
	                        .uri(targetUrl)
	                        .contentType(MediaType.APPLICATION_JSON)
	                        .bodyValue(...)
	                        .retrieve()
	                        .bodyToMono(String.class)
	                        ...
	                        .subscribe();
            });
            thread.setDaemon(true);
            thread.start();