title: Spring Boot Integration test throws error "java.lang.IllegalStateException: Timeout on blocking read for 5000 MILLISECONDS"
body: <p>The issue happens on my project that uses Spring webflux via Spring boot 2.0.0.M3. Below is the dependencies of project,</p>
  
  <pre><code>dependencies {
          compile 'org.springframework.boot:spring-boot-starter-actuator',
                  'org.springframework.cloud:spring-cloud-starter-config',
                  'org.springframework.cloud:spring-cloud-sleuth-stream',
                  'org.springframework.cloud:spring-cloud-starter-sleuth',
                  'org.springframework.cloud:spring-cloud-starter-stream-rabbit',
                  'org.springframework.boot:spring-boot-starter-data-mongodb-reactive',
                  'org.springframework.boot:spring-boot-starter-data-redis-reactive',
                  'org.springframework.boot:spring-boot-starter-integration',
                  "org.springframework.integration:spring-integration-amqp",
                  "org.springframework.integration:spring-integration-mongodb",
                  'org.springframework.retry:spring-retry',
                  'org.springframework.boot:spring-boot-starter-webflux',
                  "org.springframework.boot:spring-boot-devtools",
                  'com.fasterxml.jackson.datatype:jackson-datatype-joda',
                  'joda-time:joda-time:2.9.9',
                  'org.javamoney:moneta:1.0',
                  'com.squareup.okhttp3:okhttp:3.8.1',
                  "net.logstash.logback:logstash-logback-encoder:4.11",
                  'org.apache.commons:commons-lang3:3.5'
          compileOnly 'org.projectlombok:lombok:1.16.18'
          testCompile 'org.springframework.boot:spring-boot-starter-test',
                  'io.projectreactor:reactor-test',
                  'org.apache.qpid:qpid-broker:6.1.2',
                  'de.flapdoodle.embed:de.flapdoodle.embed.mongo'
  
          integTestCompile sourceSets.main.output
          integTestCompile configurations.testCompile
          integTestCompile sourceSets.test.output
          integTestRuntime configurations.testRuntime
      }
  </code></pre>
  
  <p>I have an REST API, and the code is below:</p>
  
  <pre><code> @RestController
      @RequestMapping(value="/internal/note")
      @Slf4j
      public class NoteController {
  
          @Autowired
          NoteRepository noteRepository;
  
          @GetMapping("/request/{id}")
          public Mono&lt;Note&gt; getNoteByRequestid(@PathVariable("id") String requestid) {
              logger.debug("Requesting note by request id '{}'.", requestid);
              return noteRepository.findByRequestid(requestid).doOnSuccess(note -&gt;
                      logger.debug("Found note '{}'.", note))
                      .doOnSuccess(response -&gt; logger.debug("Successfully found note by request id '{}'.", requestid));
          }
      }
  </code></pre>
  
  <p>The code works fine. When calling the API using Postman, it returns the correct result.</p>
  
  <p>I have the Integration test code like below: </p>
  
  <pre><code>final String data = "{xxxxx}";//JSON Data
      final Note newNote = noteRepository.save(objectMapper.readValue(data, Note.class)).block(Duration.ofSeconds(3));
              final String requestid = "5982C7366FF1C55D20CF2B70";
              this.webClient.get().uri("/internal/note/request/{id}", requestid).accept(MediaType.APPLICATION_JSON_UTF8)
                      .exchange().expectStatus().isOk();
  </code></pre>
  
  <p>But the test fails throwing error message like below:</p>
  
  <pre><code> java.lang.IllegalStateException: Timeout on blocking read for 5000 MILLISECONDS
  
          at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:109)
          at reactor.core.publisher.Mono.block(Mono.java:1304)
          at org.springframework.test.web.reactive.server.DefaultWebTestClient$DefaultRequestBodyUriSpec.toResponseSpec(DefaultWebTestClient.java:291)
          at org.springframework.test.web.reactive.server.DefaultWebTestClient$DefaultRequestBodyUriSpec.exchange(DefaultWebTestClient.java:269)
          at cn.demo.handler.NoteHandlerTest.testGetNoteByRequestidWithPriceField(NoteHandlerTest.java:62)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:498)
          at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
          at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
          at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
          at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
          at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73)
          at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83)
          at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
          at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
          at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
          at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
          at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
          at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
          at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
          at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
          at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
          at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
          at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
          at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
          at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
          at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
          at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
          at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
          at org.junit.runners.Suite.runChild(Suite.java:128)
          at org.junit.runners.Suite.runChild(Suite.java:27)
          at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
          at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
          at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
          at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
          at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
          at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
          at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
          at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
          at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
          at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
          at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
  </code></pre>
  
  <p>Any advice on how to solve the issue? </p>