java - Camel 蓝图 - 放弃等待服务异常

Question

我有一堆单元测试，用于测试蓝图中的某些路由/驼峰实现。这些测试在 95% 的时间里运行得非常好，但是每隔一段时间(大约二十分之一)我就会遇到 Camel 运行时异常:

我正在使用 Camel 2.12 运行最新版本的 Fabric8

java.lang.RuntimeException: Gave up waiting for service (objectClass=org.apache.camel.CamelContext)
    at org.apache.camel.test.blueprint.CamelBlueprintHelper.getOsgiService(CamelBlueprintHelper.java:240)
    at org.apache.camel.test.blueprint.CamelBlueprintHelper.getOsgiService(CamelBlueprintHelper.java:198)
    at org.apache.camel.test.blueprint.CamelBlueprintTestSupport.createCamelContext(CamelBlueprintTestSupport.java:304)
    at org.apache.camel.test.junit4.CamelTestSupport.doSetUp(CamelTestSupport.java:247)
    at org.apache.camel.test.junit4.CamelTestSupport.setUp(CamelTestSupport.java:217)
    at org.apache.camel.test.blueprint.CamelBlueprintTestSupport.setUp(CamelBlueprintTestSupport.java:133)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
    at org.junit.rules.RunRules.evaluate(RunRules.java:20)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
    at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
    at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)

Tests in error: 
  SystemStatusRouteBuilderTest>CamelBlueprintTestSupport.setUp:133->CamelTestSupport.setUp:217->CamelTestSupport.doSetUp:247->CamelBlueprintTestSupport.createCamelContext:304 » Runtime

我已经三次检查蓝图文件中的所有 namespace ，pom 被打包为一个包，蓝图文件位于预期位置:src/main/resources/OSGI-INF/blueprint/blueprint.xml，并且我有这样指定的 Camel maven 插件:

<plugin>
   <groupId>org.apache.camel</groupId>
   <artifactId>camel-maven-plugin</artifactId>
   <version>${camel.version}</version>
   <configuration>
      <useBlueprint>true</useBlueprint>
   </configuration>
</plugin>

关于为什么会发生这种情况有什么想法吗？由于其间歇性，因此很难调试。

Answer 1

我遇到了同样的问题(在 JUnit 测试中)并最终找到了原因。 启用完整的 Camel 跟踪时，我可以看到以下消息:

“Bundle **** 正在等待依赖项 [(&(component=ldap)(objectClass=org.apache.camel.spi.ComponentResolver)), (&(component=sql)(objectClass=org.apache. Camel .spi.ComponentResolver))] "

这导致我在我的 pom 中添加显式(测试)依赖项，即:

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-sql</artifactId>
  <version>${camel-version}</version>
 <scope>test</scope>
</dependency>

注意:为您在 Camel 路由中使用的所有组件(jaxb、ldap、sql、缓存等)做!

这使我的错误消息(“放弃等待服务异常”)消失了:-)

希望这对您有所帮助。