Handling FeignException in Brixton.SR4

[shinigami1992]

After migrating to spring boot 1.3.5.RELEASE (Brixton.SR4), I can not catch FeignException Because error actually thrown is HystrixException. how can I handle it now?

As I can see in my IDE dependecies,
feing-core package is is 8.16.2 and feign-hystrix is 8.16.2 too.

com.netflix.hystrix.exception.HystrixRuntimeException: getServiceInstanceInfo failed and no fallback available.
    at com.netflix.hystrix.AbstractCommand$21.call(AbstractCommand.java:783)
    at com.netflix.hystrix.AbstractCommand$21.call(AbstractCommand.java:768)
    at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:139)
    at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:71)
    at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:71)
    at com.netflix.hystrix.AbstractCommand$DeprecatedOnFallbackHookApplication$1.onError(AbstractCommand.java:1448)
    at com.netflix.hystrix.AbstractCommand$FallbackHookApplication$1.onError(AbstractCommand.java:1373)
    at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:71)
    at rx.observers.Subscribers$5.onError(Subscribers.java:224)
    at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:44)
    at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:28)
    at rx.Observable.unsafeSubscribe(Observable.java:8460)
    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:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.Observable.unsafeSubscribe(Observable.java:8460)
    at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:141)
    at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:71)
    at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:71)
    at com.netflix.hystrix.AbstractCommand$HystrixObservableTimeoutOperator$3.onError(AbstractCommand.java:1151)
    at rx.internal.operators.OperatorSubscribeOn$1$1.onError(OperatorSubscribeOn.java:59)
    at rx.observers.Subscribers$5.onError(Subscribers.java:224)
    at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:71)
    at rx.observers.Subscribers$5.onError(Subscribers.java:224)
    at com.netflix.hystrix.AbstractCommand$DeprecatedOnRunHookApplication$1.onError(AbstractCommand.java:1407)
    at com.netflix.hystrix.AbstractCommand$ExecutionHookApplication$1.onError(AbstractCommand.java:1338)
    at rx.observers.Subscribers$5.onError(Subscribers.java:224)
    at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:44)
    at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:28)
    at rx.Observable.unsafeSubscribe(Observable.java:8460)
    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:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.Observable.unsafeSubscribe(Observable.java:8460)
    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:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.Observable.unsafeSubscribe(Observable.java:8460)
    at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
    at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:56)
    at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:47)
    at org.springframework.cloud.sleuth.instrument.hystrix.SleuthHystrixConcurrencyStrategy$HystrixTraceCallable.call(SleuthHystrixConcurrencyStrategy.java:140)
    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$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    ... 1 common frames omitted
Caused by: feign.FeignException: status 404 reading LambdaDevClient#getServiceInstanceInfo(String)
    at feign.FeignException.errorStatus(FeignException.java:62)
    at feign.codec.ErrorDecoder$Default.decode(ErrorDecoder.java:91)
    at org.springframework.cloud.sleuth.instrument.web.client.feign.TraceFeignErrorDecoder.decode(TraceFeignErrorDecoder.java:47)
    at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:134)
    at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:76)
    at feign.hystrix.HystrixInvocationHandler$1.run(HystrixInvocationHandler.java:97)
    at com.netflix.hystrix.HystrixCommand$1.call(HystrixCommand.java:293)
    at com.netflix.hystrix.HystrixCommand$1.call(HystrixCommand.java:289)
    at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)
    ... 24 common frames omitted

[codefromthecrypt]

I'm not sure what we can do here.. hystrix's observable wrapper is the thing wrapping the feign exception. Have you tried creating a fallback for your type?

[shinigami1992]

My main question is why Hystrix wrapping my exception and how can I disable it.

I just try to add some ErrorDecoder and throwing my own exception, but HystrixException again wrapped my custorm exception.

Would you please tell me how creating a fallback could help me in this situation?

[shinigami1992]

It seems I must set feign.hystrix.enabled=false or leave it true and use exception.getCause() to access FeignException.