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Connection prematurely closed BEFORE response when using Spring WebClient with Wiremock proxy

See original GitHub issue

When getting a URL using Spring WebClient with ReactorClientHttpConnector, and using Wiremock as a proxy, it fails with Connection prematurely closed BEFORE response, see stack trace below.

The same setup works fine with other HTTP client libraries, at least with okhttp3.

Hopefully the example code included should be easy enough to understand. Wiremock is set up to enable proxying, all requests are set to return the string “foo” as text/plain.

When making a request with WebClient, the result is expected to be “foo”, but it instead fails with the stack stack trace as shown below.

See example at the end, and also a runnable test in the Git repository here: https://github.com/vetler/spring-webclient-bug

This works fine with JettyClientHttpConnector, branch with passing test for that here: https://github.com/vetler/spring-webclient-bug/tree/test/jettyclienthttpconnector

org.springframework.web.reactive.function.client.WebClientRequestException: Connection prematurely closed BEFORE response; nested exception is reactor.netty.http.client.PrematureCloseException: Connection prematurely closed BEFORE response

	at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException$9(ExchangeFunctions.java:141)
	Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
	|_ checkpoint ⇢ Request to GET http://example.com [DefaultWebClient]
Stack trace:
		at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException$9(ExchangeFunctions.java:141)
		at reactor.core.publisher.MonoErrorSupplied.subscribe(MonoErrorSupplied.java:55)
		at reactor.core.publisher.Mono.subscribe(Mono.java:4361)
		at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103)
		at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
		at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
		at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
		at reactor.core.publisher.MonoNext$NextSubscriber.onError(MonoNext.java:93)
		at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onError(MonoFlatMapMany.java:204)
		at reactor.core.publisher.SerializedSubscriber.onError(SerializedSubscriber.java:124)
		at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.whenError(FluxRetryWhen.java:225)
		at reactor.core.publisher.FluxRetryWhen$RetryWhenOtherSubscriber.onError(FluxRetryWhen.java:274)
		at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:414)
		at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onNext(FluxConcatMap.java:251)
		at reactor.core.publisher.EmitterProcessor.drain(EmitterProcessor.java:491)
		at reactor.core.publisher.EmitterProcessor.tryEmitNext(EmitterProcessor.java:299)
		at reactor.core.publisher.SinkManySerialized.tryEmitNext(SinkManySerialized.java:100)
		at reactor.core.publisher.InternalManySink.emitNext(InternalManySink.java:27)
		at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.onError(FluxRetryWhen.java:190)
		at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:189)
		at reactor.netty.http.client.HttpClientConnect$HttpObserver.onUncaughtException(HttpClientConnect.java:384)
		at reactor.netty.ReactorNetty$CompositeConnectionObserver.onUncaughtException(ReactorNetty.java:647)
		at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onUncaughtException(DefaultPooledConnectionProvider.java:219)
		at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnection.onUncaughtException(DefaultPooledConnectionProvider.java:467)
		at reactor.netty.http.client.HttpClientOperations.onInboundClose(HttpClientOperations.java:289)
		at reactor.netty.channel.ChannelOperationsHandler.channelInactive(ChannelOperationsHandler.java:73)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
		at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelInactive(CombinedChannelDuplexHandler.java:418)
		at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:389)
		at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:354)
		at io.netty.handler.codec.http.HttpClientCodec$Decoder.channelInactive(HttpClientCodec.java:326)
		at io.netty.channel.CombinedChannelDuplexHandler.channelInactive(CombinedChannelDuplexHandler.java:221)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
		at io.netty.handler.proxy.ProxyHandler.channelInactive(ProxyHandler.java:230)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
		at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelInactive(CombinedChannelDuplexHandler.java:418)
		at io.netty.channel.CombinedChannelDuplexHandler.channelInactive(CombinedChannelDuplexHandler.java:223)
		at io.netty.handler.proxy.HttpProxyHandler$HttpClientCodecWrapper.channelInactive(HttpProxyHandler.java:267)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
		at io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1405)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
		at io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:901)
		at io.netty.channel.AbstractChannel$AbstractUnsafe$8.run(AbstractChannel.java:831)
		at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:164)
		at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java)
		at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469)
		at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:497)
		at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)
		at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
		at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
		at java.base/java.lang.Thread.run(Thread.java:829)
	Suppressed: java.lang.Exception: #block terminated with an error
		at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:99)
		at reactor.core.publisher.Mono.block(Mono.java:1706)
		at com.example.demo.DemoApplicationTests.contextLoads(DemoApplicationTests.java:37)
		at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
		at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.base/java.lang.reflect.Method.invoke(Method.java:566)
		at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:688)
		at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
		at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
		at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
		at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)
		at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)
		at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
		at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
		at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
		at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
		at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
		at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
		at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
		at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
		at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:210)
		at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
		at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:206)
		at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:131)
		at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:65)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
		at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
		at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
		at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
		at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
		at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)
		at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
		at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
		at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
		at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
		at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)
		at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
		at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
		at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
		at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
		at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
		at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
		at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108)
		at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
		at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
		at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
		at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
		at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96)
		at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75)
		at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71)
		at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
		at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
		at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: reactor.netty.http.client.PrematureCloseException: Connection prematurely closed BEFORE response

Disconnected from the target VM, address: '127.0.0.1:54721', transport: 'socket'

Process finished with exit code -1

Here is a test to reproduce:

@SpringBootTest
class DemoApplicationTests {
    @RegisterExtension
    WireMockExtension wm1 = WireMockExtension.newInstance()
            .options(wireMockConfig().enableBrowserProxying(true).port(10001))
            .build();

    @Test
    void contextLoads() {
        wm1.stubFor(
                get(urlMatching(".*"))
                        .willReturn(
                                aResponse()
                                        .withHeader("Content-Type", "text/plain")
                                        .withBody("foo")
                        )
        );

        System.setProperty("http.proxyHost", "localhost");
        System.setProperty("http.proxyPort", Integer.toString(wm1.getRuntimeInfo().getHttpPort()));

        WebClient client = WebClient.builder().clientConnector(new ReactorClientHttpConnector(HttpClient.create().proxyWithSystemProperties())).build();
        String result = client.get().uri("http://example.com").retrieve().bodyToMono(String.class).block();

        assertEquals("foo", result);
    }

}

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Reactions:1
  • Comments:7 (1 by maintainers)

github_iconTop GitHub Comments

1reaction
vetlercommented, Oct 15, 2021

Reactor Netty HttpClient test case created and reported in Reactor Netty here: https://github.com/reactor/reactor-netty/issues/1857

1reaction
vetlercommented, Oct 7, 2021

Whoops, yes the repository was private. Should be public now, @rafamdr

Read more comments on GitHub >

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