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[Springcloud一步步实现广告系统]21.系统错误汇总-创新互联

广告系统学习过程中问题答疑

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Eureka集群启动报错

Answer

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因为Eureka在集群启动过程中，会连接集群中其他的机器进行数据同步，在这个过程中，如果别的服务还没有启动完成，就会出现Connection refused: connecterror，当其他节点启动完成之后，报错就会消失。

AdSearch 服务启动报错

2019-08-16 10:27:57.038 ERROR 73180 --- [           main] o.s.boot.SpringApplication               : Application run failed

java.lang.IllegalStateException: Failed to introspect Class [org.springframework.boot.autoconfigure.kafka.KafkaAnnotationDrivenConfiguration] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
    at org.springframework.util.ReflectionUtils.getDeclaredFields(ReflectionUtils.java:760) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:725) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:710) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.boot.test.mock.mockito.DefinitionsParser.parse(DefinitionsParser.java:62) ~[spring-boot-test-2.1.5.RELEASE.jar:2.1.5.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.postProcessBeanFactory(MockitoPostProcessor.java:141) ~[spring-boot-test-2.1.5.RELEASE.jar:2.1.5.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.postProcessBeanFactory(MockitoPostProcessor.java:133) ~[spring-boot-test-2.1.5.RELEASE.jar:2.1.5.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:286) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:174) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:705) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:127) [spring-boot-test-2.1.5.RELEASE.jar:2.1.5.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:118) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener.prepareTestInstance(SpringBootDependencyInjectionTestExecutionListener.java:44) [spring-boot-test-autoconfigure-2.1.5.RELEASE.jar:2.1.5.RELEASE]
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4Cla***unner.createTest(SpringJUnit4Cla***unner.java:227) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4Cla***unner$1.runReflectiveCall(SpringJUnit4Cla***unner.java:289) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4Cla***unner.methodBlock(SpringJUnit4Cla***unner.java:291) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4Cla***unner.runChild(SpringJUnit4Cla***unner.java:246) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4Cla***unner.runChild(SpringJUnit4Cla***unner.java:97) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4Cla***unner.run(SpringJUnit4Cla***unner.java:190) [spring-test-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137) [junit-4.12.jar:4.12]
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) [junit-rt.jar:na]
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) [junit-rt.jar:na]
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) [junit-rt.jar:na]
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) [junit-rt.jar:na]
Caused by: java.lang.NoClassDefFoundError: Lorg/springframework/kafka/listener/AfterRollbackProcessor;
    at java.lang.Class.getDeclaredFields0(Native Method) ~[na:1.8.0_171]
    at java.lang.Class.privateGetDeclaredFields(Class.java:2583) ~[na:1.8.0_171]
    at java.lang.Class.getDeclaredFields(Class.java:1916) ~[na:1.8.0_171]
    at org.springframework.util.ReflectionUtils.getDeclaredFields(ReflectionUtils.java:755) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
    ... 40 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.kafka.listener.AfterRollbackProcessor
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_171]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_171]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_171]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_171]
    ... 44 common frames omitted

2019-08-16 10:27:57.119  INFO 73180 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$2c3f141a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

查看这个错误，是在加载org.springframework.kafka.listener.AfterRollbackProcessor的时候，没有找到对应的class，可是我们明明添加了依赖呀？


  
      org.springframework.kafka
      spring-kafka
      2.1.5.RELEASE

ok, 我们来查询，首先，在实际工作中，大家为了最快的解决问题，必须借助搜索引擎的力量，作为一个合格的程序猿，尽量少baidu....我一般习惯https://cn.bing.com/ ,搜索相关报错，可以看到第一个就是程序界的错误大佬，

stackworkflow解决bug传送门 .

说的非常清楚：

Spring for Apache Kafka2.0.xis not compatible with Spring Boot2.1.x. You have to useSpring-Kafka 2.2.x. More over would be better to just rely on the dependency from Spring Boot per se. please, see https://start.spring.io/ for more info how properly start the project for Spring Boot.

And please, don’t duplicate your question in different places if that was not asked.

错误说明，在org.springframework.kafka,因为我们使用的springboot 版本是2.1.5.RELEASE，所以版本存在差异化，因此我们修改版本为:


  
      org.springframework.kafka
      spring-kafka
      2.2.8.RELEASE

再次启动，一切ok。

[Spring cloud 一步步实现广告系统] 21. 系统错误汇总

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文章标题：[Springcloud一步步实现广告系统]21.系统错误汇总-创新互联
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