Camel Blueprint - 等待服务异常

Question

我有一堆单元测试来测试Blueprint中的一些路由/驼峰实现.这些测试在95%的时间内都运行得非常好但是每隔一段时间(大约20个左右)我得到一个Camel Runtime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命名空间,pom打包为一个包,蓝图文件位于预期的位置:src/main/resources/OSGI-INF/blueprint/blueprint.xml,我有camel maven插件指定如下:

<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的任何想法？由于其间歇性,它很难调试.

Answer 1

这是 CamelBlueprintTestSupport 的常见问题。

请参阅此处克劳斯的评论 - http://fusesource.com/forums/thread.jspa?threadID=4695

是的，我也时常看到这一点。您可以运行测试 100 次，并且可能会失败几次等等。不确定会发生什么，如果是 pojosr 或蓝图等。尽管 OSGi 和 Blueprint 有一个非常复杂的启动模型，其中所有内容都是异步的，并且有点互相等待。这很难彻底测试。

您可以尝试设置 Surefire 插件以在每次测试时分叉 jvm。然后在每次测试中它都是一个全新的 JVM。这可能会解决这个问题，以防在同一个 JVM 中运行所有测试时出现一些“剩余”。

我自己也经历过这个问题