I updated spring-cloud-dependencies version to Greenwich.SR3, spring-boot-starter-parent version to 2.1.8.RELEASE.An exception occurred when service A(named saas-login) invoked service B(named saas-redis) through feign:

c.n.loadbalancer.reactive.LoadBalancerCommand - Got error java.io.IOException: Incomplete output stream when executed on server DESKTOP-JJLLNU5:8084
2019-10-09 10:52:16.211 [hystrix-saas-redis-79] DEBUG com.netflix.hystrix.AbstractCommand - Error executing HystrixCommand.run(). Proceeding to fallback logic ...
feign.RetryableException: Incomplete output stream executing POST http://saas-redis/saas-redis/cache/batchGetCache
……
Caused by: java.io.IOException: Incomplete output stream
……

I add a breakpoint on method of Service B and It was entered when Service A invoking this method in Service B, but Service A was not blocked and an exception has occurred, this may be due to asynchronous calls between services. But every thing was OK before I upgrading spring-cloud-dependencies version and spring-boot-starter-parent version. My feign client code is like below:

@FeignClient(value = "saas-redis",fallback = SaasRedisAPIFallback.class)
public interface SaasRedisAPI {

    @RequestMapping(value = "/saas-redis/cache/getCache", method = RequestMethod.POST )
    ResponseData<String> getCache(@RequestBody RequestData<CacheVO> requestData);

    @RequestMapping(value = "/saas-redis/cache/batchGetCache", method = RequestMethod.POST )
    ResponseData<Map<String,String>> batchGetCache(@RequestBody RequestData<List<CacheVO>> requestData);
}

How to invoke other services synchronously as before and how to invoke other services asynchronously on the newest spring cloud dependency version, THKS!

Comment From: spencergibb

I'm afraid without a full stacktrace, we're not going to be much help.

Comment From: pgm-rookie

2019-10-09 11:30:15.817 [hystrix-saas-redis-120] DEBUG c.n.loadbalancer.reactive.LoadBalancerCommand - Got error java.io.IOException: Incomplete output stream when executed on server DESKTOP-JJLLNU5:8084
2019-10-09 11:30:15.819 [hystrix-saas-redis-120] DEBUG com.netflix.hystrix.AbstractCommand - Error executing HystrixCommand.run(). Proceeding to fallback logic ...
feign.RetryableException: Incomplete output stream executing POST http://saas-redis/saas-redis/cache/batchGetCache
    at feign.FeignException.errorExecuting(FeignException.java:132)
    at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:113)
    at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:78)
    at feign.hystrix.HystrixInvocationHandler$1.run(HystrixInvocationHandler.java:109)
    at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:302)
    at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:298)
    at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)
    at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.Observable.unsafeSubscribe(Observable.java:10327)
    at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)
    at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
    at rx.Observable.unsafeSubscribe(Observable.java:10327)
    at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
    at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
    at rx.Observable.unsafeSubscribe(Observable.java:10327)
    at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.call(OperatorSubscribeOn.java:100)
    at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:56)
    at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:47)
    at org.saas.businessCommon.config.FeignHystrixConcurrencyStrategy$WrappedCallable.call(FeignHystrixConcurrencyStrategy.java:116)
    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$$$capture(Executors.java:511)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java)
    at java.util.concurrent.FutureTask.run$$$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$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Incomplete output stream
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1523)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
    at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
    at feign.Client$Default.convertResponse(Client.java:143)
    at feign.Client$Default.execute(Client.java:68)
    at org.springframework.cloud.openfeign.ribbon.RetryableFeignLoadBalancer$1.doWithRetry(RetryableFeignLoadBalancer.java:114)
    at org.springframework.cloud.openfeign.ribbon.RetryableFeignLoadBalancer$1.doWithRetry(RetryableFeignLoadBalancer.java:94)
    at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:287)
    at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:180)
    at org.springframework.cloud.openfeign.ribbon.RetryableFeignLoadBalancer.execute(RetryableFeignLoadBalancer.java:94)
    at org.springframework.cloud.openfeign.ribbon.RetryableFeignLoadBalancer.execute(RetryableFeignLoadBalancer.java:54)
    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$3.call(ScalarSynchronousObservable.java:228)
    at rx.Observable.unsafeSubscribe(Observable.java:10327)
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber$1.call(OperatorRetryWithPredicate.java:127)
    at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.enqueue(TrampolineScheduler.java:73)
    at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.schedule(TrampolineScheduler.java:52)
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:79)
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:45)
    at rx.internal.util.ScalarSynchronousObservable$WeakSingleProducer.request(ScalarSynchronousObservable.java:276)
    at rx.Subscriber.setProducer(Subscriber.java:209)
    at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:138)
    at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:129)
    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.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$1.call(LoadBalancerCommand.java:180)
    at rx.Observable.unsafeSubscribe(Observable.java:10327)
    at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94)
    at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42)
    at rx.Observable.unsafeSubscribe(Observable.java:10327)
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber$1.call(OperatorRetryWithPredicate.java:127)
    at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.enqueue(TrampolineScheduler.java:73)
    at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.schedule(TrampolineScheduler.java:52)
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:79)
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:45)
    at rx.internal.util.ScalarSynchronousObservable$WeakSingleProducer.request(ScalarSynchronousObservable.java:276)
    at rx.Subscriber.setProducer(Subscriber.java:209)
    at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:138)
    at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:129)
    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.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 feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:108)
... 34 common frames omitted

Comment From: pgm-rookie

Startup class of Service A :

@EnableDiscoveryClient
@SpringBootApplication(scanBasePackages = {"org.saas"},exclude = {DataSourceAutoConfiguration.class, DruidDataSourceAutoConfigure.class,MongoDataAutoConfiguration.class,MongoAutoConfiguration.class})
@EnableFeignClients(basePackages = "org.saas")
@EnableCircuitBreaker
@EnableScheduling
@MapperScan({"org.saas.login.dao","org.saas.login.dao2"})
public class LoginApplication {

    public static void main(String[] args) {
        SpringApplication.run(LoginApplication.class, args);
    }
}

Startup class of Service B :

@EnableDiscoveryClient
@SpringBootApplication(exclude = {MongoAutoConfiguration.class, MongoDataAutoConfiguration.class})
@EnableFeignClients(basePackages = "org.saas")
@EnableCircuitBreaker
@EnableScheduling
@ComponentScan(basePackages = {"org.saas"},excludeFilters = @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, classes = {MvcConfiguration.class}))
public class SaasRedisApplication {

    public static void main(String[] args) {
            SpringApplication.run(SaasRedisApplication.class, args);
    }
}

Comment From: debianwak

move pom.xml to another previous version for Spring cloud from here: https://github.com/spring-projects/spring-cloud/wiki/Spring-Cloud-Greenwich-Release-Notes like this: Greenwich.RELEASE

Comment From: ryanjbaxter

Can you try with Hoxton.SR2? If you still experience the problem please provide a sample that reproduces the problem.

Comment From: spring-projects-issues

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

Comment From: spring-projects-issues

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.

Comment From: bilal89hayat

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.1</version>
        <relativePath/>
    </parent>


<properties>
        <java.version>17</java.version>
        <spring-cloud.version>2023.0.0</spring-cloud.version>
</properties>

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
            <version>1.4.6.RELEASE</version>
 </dependency>

========================== Solution : updatedHttpHeaders.remove("content-length");

ResponseEntity responseEntity = client.executeRequest(request, updatedHttpHeaders);

Note : Check ur spring and cloud compatibility.

Comment From: fantunao

<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>3.2.1</version> <relativePath/> </parent>

``` 17 2023.0.0

org.springframework.cloud spring-cloud-starter-feign 1.4.6.RELEASE ```

========================== Solution : updatedHttpHeaders.remove("content-length");

ResponseEntity responseEntity = client.executeRequest(request, updatedHttpHeaders);

Note : Check ur spring and cloud compatibility.

this work for me, thanks @bilal89hayat updatedHttpHeaders.remove("content-length");

.