Gateway MVC: Calling the Wiremock service results in a java.io.IOException: EOF reached while reading.

[NiiazKhan]

I use java 21, Gradle, Spring cloud 2023.0.0, Spring Boot 3.2.2, spring-cloud-starter-gateway-mvc:4.1.1 and spring-cloud-gateway-server-mvc:4.1.1 .
Calling the Wiremock service from the Gateway MVC service results in a java.io.IOException: EOF reached while reading.
BUT it works for Gateway (WebFlux)!!!

When the Application-Mode=demo header is passed, routing to the Wiremock service should occur.
https://wiremock.org/docs/download-and-installation/

1. I run wiremock:

docker run -it --rm -p 8080:8080 --name wiremock \
  wiremock/wiremock:3.4.1

2. setting a universal stub for all calls:

curl --location --request POST 'http://localhost:8080/__admin/mappings' \
--data-raw '{
  "request": {
    "method": "ANY",
    "urlPattern": ".*"
  },
  "response": {
    "status": 200,
    "body": "This is a universal response to all requests.",
    "headers": {
      "Content-Type": "text/plain"
    }
  }
}
'

3. check my stub http://localhost:8080/__admin/mappings
4. I use Postman to do POST localhost:8080/authenticate/test and get response 200 "This is a universal response to all requests."
5. I run my Gateway MVC in port 8081:

server:
  port: 8081
  shutdown: graceful
  error:
    include-message: always

spring:
  application:
    name: my-gateway
  threads:
    virtual:
      enabled: true
  cloud:
    config:
      enabled: false
    gateway:
      mvc:
        routes:
          - id: my-wiremock
            uri: http://localhost:8080
            predicates:
              - Header=Application-Mode, demo

6. I use Postman to do POST localhost:8081/authenticate/test or curl curl --location --request POST 'localhost:8081/authenticate/test' \ --header 'Application-Mode: demo' \ --data-raw ''

7. I have exception:

12/03/24 16:22:51.525 TRACE [tomcat-handler-1] o.s.w.s.DispatcherServlet [serviceName=my-gateway, traceId=65f0491b6568f295607788e7ba2ea2d5, spanId=607788e7ba2ea2d5] [FrameworkServlet.java:1106] Failed to complete request
 org.springframework.web.client.ResourceAccessException: I/O error on POST request for "http://localhost:8080/authenticate/test": EOF reached while reading
	at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.createResourceAccessException(DefaultRestClient.java:549)
	at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.exchangeInternal(DefaultRestClient.java:474)
	at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.exchange(DefaultRestClient.java:444)
	at org.springframework.cloud.gateway.server.mvc.handler.RestClientProxyExchange.exchange(RestClientProxyExchange.java:40)
	at org.springframework.cloud.gateway.server.mvc.handler.ProxyExchangeHandlerFunction.handle(ProxyExchangeHandlerFunction.java:105)
	at org.springframework.cloud.gateway.server.mvc.handler.HandlerFunctions$LookupProxyExchangeHandlerFunction.handle(HandlerFunctions.java:102)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$ofRequestProcessor$3(HandlerFilterFunction.java:83)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$andThen$0(HandlerFilterFunction.java:58)
	at org.springframework.cloud.gateway.server.mvc.config.GatewayMvcPropertiesBeanDefinitionRegistrar.lambda$getRouterFunction$3(GatewayMvcPropertiesBeanDefinitionRegistrar.java:180)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$andThen$0(HandlerFilterFunction.java:58)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$ofRequestProcessor$3(HandlerFilterFunction.java:83)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$andThen$1(HandlerFilterFunction.java:59)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$andThen$1(HandlerFilterFunction.java:59)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$apply$2(HandlerFilterFunction.java:70)
	at org.springframework.web.servlet.function.support.HandlerFunctionAdapter.handle(HandlerFunctionAdapter.java:107)
Caused by: java.io.IOException: EOF reached while reading
	at java.net.http/jdk.internal.net.http.HttpClientImpl.send(HttpClientImpl.java:964)
	at java.net.http/jdk.internal.net.http.HttpClientFacade.send(HttpClientFacade.java:133)
	at org.springframework.http.client.JdkClientHttpRequest.executeInternal(JdkClientHttpRequest.java:102)
	at org.springframework.http.client.AbstractStreamingClientHttpRequest.executeInternal(AbstractStreamingClientHttpRequest.java:70)
	at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:66)
	at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.exchangeInternal(DefaultRestClient.java:468)
	at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.exchange(DefaultRestClient.java:444)
	at org.springframework.cloud.gateway.server.mvc.handler.RestClientProxyExchange.exchange(RestClientProxyExchange.java:40)
	at org.springframework.cloud.gateway.server.mvc.handler.ProxyExchangeHandlerFunction.handle(ProxyExchangeHandlerFunction.java:105)
	at org.springframework.cloud.gateway.server.mvc.handler.HandlerFunctions$LookupProxyExchangeHandlerFunction.handle(HandlerFunctions.java:102)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$ofRequestProcessor$3(HandlerFilterFunction.java:83)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$andThen$0(HandlerFilterFunction.java:58)
	at org.springframework.cloud.gateway.server.mvc.config.GatewayMvcPropertiesBeanDefinitionRegistrar.lambda$getRouterFunction$3(GatewayMvcPropertiesBeanDefinitionRegistrar.java:180)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$andThen$0(HandlerFilterFunction.java:58)
	at org.springframework.web.servlet.function.HandlerFilterFunction.lambda$ofRequestProcessor$3(HandlerFilterFunction.java:83)
Caused by: java.io.EOFException: EOF reached while reading
	at java.net.http/jdk.internal.net.http.Http2Connection$Http2TubeSubscriber.onComplete(Http2Connection.java:1587)
	at java.net.http/jdk.internal.net.http.SocketTube$InternalReadPublisher$ReadSubscription.signalCompletion(SocketTube.java:648)
	at java.net.http/jdk.internal.net.http.SocketTube$InternalReadPublisher$InternalReadSubscription.read(SocketTube.java:853)
	at java.net.http/jdk.internal.net.http.SocketTube$SocketFlowTask.run(SocketTube.java:181)
	at java.net.http/jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:207)
	at java.net.http/jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:280)
	at java.net.http/jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:233)
	at java.net.http/jdk.internal.net.http.SocketTube$InternalReadPublisher$InternalReadSubscription.signalReadable(SocketTube.java:782)
	at java.net.http/jdk.internal.net.http.SocketTube$InternalReadPublisher$ReadEvent.signalEvent(SocketTube.java:965)
	at java.net.http/jdk.internal.net.http.SocketTube$SocketFlowEvent.handle(SocketTube.java:253)
	at java.net.http/jdk.internal.net.http.HttpClientImpl$SelectorManager.handleEvent(HttpClientImpl.java:1467)
	at java.net.http/jdk.internal.net.http.HttpClientImpl$SelectorManager.lambda$run$3(HttpClientImpl.java:1412)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.net.http/jdk.internal.net.http.HttpClientImpl$SelectorManager.run(HttpClientImpl.java:1412)
12/03/24 16:22:51.526 TRACE [tomcat-handler-1] o.s.b.f.s.DefaultListableBeanFactory [serviceName=my-gateway, traceId=65f0491b6568f295607788e7ba2ea2d5, spanId=607788e7ba2ea2d5] [AbstractBeanFactory.java:255] Returning cached instance of singleton bean 'refreshEventListener'

[NiiazKhan]

@spencergibb help me please :) it is important for our product.

[NiiazKhan]

it works for Spring Cloud Gateway (webFlux);

2024-03-12 16:29:45.699 DEBUG [,335e0f90ba18145f,335e0f90ba18145f] 54378 --- [ctor-http-nio-4] n.m.g.w.l.RequestResponseLoggingFilter   :  RESPONSE [traceId=335e0f90ba18145f]: [took 71 ms] [200 OK] /authenticate/test
RESPONSE BODY: �����������,V��D�Ҽ̲Ԣ����������T��|������4���X����?z-���
2024-03-12 16:29:45.704 DEBUG [,,] 54378 --- [ctor-http-nio-4] r.n.r.DefaultPooledConnectionProvider    : [c4600e68, L:/127.0.0.1:50162 - R:localhost/127.0.0.1:8080] onStateChange(POST{uri=/authenticate/test, connection=PooledConnection{channel=[id: 0xc4600e68, L:/127.0.0.1:50162 - R:localhost/127.0.0.1:8080]}}, [response_completed])

[spencergibb]

See #3183 (comment) there is an issue with the JDK http client and wiremock with http 2

[NiiazKhan]

@spencergibb thank you! It works great.