Spring-cloud升级异常:java.lang.NoSuchMethodError: feign.Request.requestBody()LfeignRequest$Body；

错误现象

使用feign调用接口报错:

Caused by: java.lang.NoSuchMethodError: feign.Request.requestBody()Lfeign/Request$Body; at feign.httpclient.ApacheHttpClient.toHttpUriRequest(ApacheHttpClient.java:137) at feign.httpclient.ApacheHttpClient.execute(ApacheHttpClient.java:81) at org.springframework.cloud.sleuth.instrument.web.client.feign.TracingFeignClient.execute(TracingFeignClient.java:81) at org.springframework.cloud.sleuth.instrument.web.client.feign.LazyTracingFeignClient.execute(LazyTracingFeignClient.java:60) at org.springframework.cloud.openfeign.ribbon.FeignLoadBalancer.execute(FeignLoadBalancer.java:93) at org.springframework.cloud.openfeign.ribbon.FeignLoadBalancer.execute(FeignLoadBalancer.java:56) at com.netflix.client.AbstractLoadBalancerAwareClient$1.call(AbstractLoadBalancerAwareClient.java:104) at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:303) at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:287) at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:231) at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:228) at rx.Observable.unsafeSubscribe(Observable.java:10327) at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.drain(OnSubscribeConcatMap.java:286) at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.onNext(OnSubscribeConcatMap.java:144) at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:185) at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180) at rx.Observable.unsafeSubscribe(Observable.java:10327) at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94) at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42) at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) at rx.Observable.subscribe(Observable.java:10423) at rx.Observable.subscribe(Observable.java:10390) at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:443) at rx.observables.BlockingObservable.single(BlockingObservable.java:340) at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:112) at org.springframework.cloud.openfeign.ribbon.LoadBalancerFeignClient.execute(LoadBalancerFeignClient.java:83) at org.springframework.cloud.sleuth.instrument.web.client.feign.TraceLoadBalancerFeignClient.execute(TraceLoadBalancerFeignClient.java:78) at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:119) at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:89) at feign.hystrix.HystrixInvocationHandler$1.run(HystrixInvocationHandler.java:109) at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:302) at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:298) at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46) ... 28 common frames omitted

问题出现场景

项目spring-cloud版本从Greenwich.SR3升级到2.3.0.RELEASE接口进行feign接口调用报错

问题排查

根据报错信息异常出在ApacheHttpClient中，报错无此方法，此处可以看一下类中确实不存在feign.Request.requestBody()这个方法。

通过查询feign相关资料，feign调用可以有两种http请求方式供选择，httpClient和okHttp，默认是httpClient的请求方式，在配置文件中的如果无配置则默认开启httpClient的请求方式。

临时解决

此处可以修改配置改为okHttp请求，修改配置为

feign: okhttp:true httpclient:false

这里需要关闭httpclient，不然即使配置了okhttp也不会走到okhttp，改为okhttp后接口调用，调用就正常了

长期方案

检查项目的pom文件 项目中有单独配置了

<dependency> <groupId>io.github.openfeign</groupId> <artifactId>feign-httpclient</artifactId> <version>10.5.1</version> </dependency>

此处的feign-httpClient版本过低，改为10.10.x以上版本就没问题，另外直接删除掉此pom，直接使用spring-cloud当前版本自带的也可解决问题。