fegin 调用的坑

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最新推荐文章于 2025-04-20 00:00:00 发布

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项目中微服务之间调用使用 fegin，有一个大坑，先看报错

com.netflix.hystrix.exception.HystrixRuntimeException: MonitorDeviceTypeService#getModelById(Long) failed and no fallback available.
   at com.netflix.hystrix.AbstractCommand$22.call(AbstractCommand.java:822)
   at com.netflix.hystrix.AbstractCommand$22.call(AbstractCommand.java:807)
   at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:140)
   at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
   at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
   at com.netflix.hystrix.AbstractCommand$DeprecatedOnFallbackHookApplication$1.onError(AbstractCommand.java:1472)
   at com.netflix.hystrix.AbstractCommand$FallbackHookApplication$1.onError(AbstractCommand.java:1397)
   at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
   at rx.observers.Subscribers$5.onError(Subscribers.java:230)
   at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:44)
   at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:28)
   at rx.Observable.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)
   at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
   at rx.Observable.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
   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.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
   at rx.Observable.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
   at rx.Observable.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
   at rx.Observable.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:142)
   at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
   at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
   at com.netflix.hystrix.AbstractCommand$HystrixObservableTimeoutOperator$3.onError(AbstractCommand.java:1194)
   at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.onError(OperatorSubscribeOn.java:80)
   at rx.observers.Subscribers$5.onError(Subscribers.java:230)
   at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
   at rx.observers.Subscribers$5.onError(Subscribers.java:230)
   at com.netflix.hystrix.AbstractCommand$DeprecatedOnRunHookApplication$1.onError(AbstractCommand.java:1431)
   at com.netflix.hystrix.AbstractCommand$ExecutionHookApplication$1.onError(AbstractCommand.java:1362)
   at rx.observers.Subscribers$5.onError(Subscribers.java:230)
   at rx.observers.Subscribers$5.onError(Subscribers.java:230)
   at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:44)
   at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:28)
   at rx.Observable.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)
   at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
   at rx.Observable.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)
   at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
   at rx.Observable.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
   at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
   at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
   at rx.Observable.unsafeSubscribe(Observable.java:10327)
   at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.call(OperatorSubscribeOn.java:100)
   at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:56)
   at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:47)
   at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction.call(HystrixContexSchedulerAction.java:69)
   at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
   at java.util.concurrent.FutureTask.run(FutureTask.java)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   at java.lang.Thread.run(Thread.java:748)
Caused by: feign.FeignException: status 405 reading MonitorDeviceTypeService#getMonitorDeviceTypeById(Long)
   at feign.FeignException.errorStatus(FeignException.java:78)
   at feign.codec.ErrorDecoder$Default.decode(ErrorDecoder.java:93)
   at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:149)
   at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:78)
   at feign.hystrix.HystrixInvocationHandler$1.run(HystrixInvocationHandler.java:106)
   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)
   ... 27 more

我的接口是这样写的：

@FeignClient("stemo")
public interface FeginBizserviceService {

    @RequestMapping(value = "api/getModelById", method = RequestMethod.GET)
    public ResponseBo getModel(Long code);
}
结果报错了，为什么呢？因为 get 方式调用默认是字符串类型参数，如果是别的类型，需要加注解

@RequestParam ,否则找不到对应的参数。

@RequestMapping(value = "api/getModelById", method = RequestMethod.GET) public ResponseBo getModel(@RequestParam Long code);

修改后运行正常，调用成功。

注意，如果是多个参数，需要这样写：

@RequestMapping(value = "api/getModelById", method = RequestMethod.GET) public ResponseBo getModel(@RequestParam("code") Long code,@RequestParam("plan") String plan);

记录完毕！