嘗試使用IntelliJ IDEA開發工具實現SpringBoot集成Dubbo，在實現Dubbo服務提供者模塊時，出現了幾個問題，這裏整理一下。
1. 最初實現環境：IntelliJ IDEA 2018.2.5 x64、JDK 1.8.0_112、SpringBoot 2.2.2、Dubbo 1.0.0、zookeeper-3.4.10；
2. 運行時出現的問題：
(1) 控制檯報錯信息：==》問題原因：Dubbo 版本過低； 處理問題：改用Dubbo 2.0.0
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.2.RELEASE)
2020-01-11 02:23:59.041 INFO 22420 --- [ main] c.s.s.SpringbootDubboProviderApplication : Starting SpringbootDubboProviderApplication on DESKTOP-GavinLee with PID 22420 (E:\workspace\SpringBootProject\springboot-dubbo-provider\target\classes started by Gavin Lee in E:\workspace\SpringBootProject)
2020-01-11 02:23:59.044 INFO 22420 --- [ main] c.s.s.SpringbootDubboProviderApplication : No active profile set, falling back to default profiles: default
2020-01-11 02:23:59.712 ERROR 22420 --- [ main] o.s.boot.SpringApplication : Application run failed
java.lang.IllegalStateException: Error processing condition on com.alibaba.dubbo.spring.boot.DubboAutoConfiguration.dubboProtocolConfig
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:60) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:184) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:144) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:120) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:337) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:242) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:706) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at com.sztxtech.springbootdubboprovider.SpringbootDubboProviderApplication.main(SpringbootDubboProviderApplication.java:12) [classes/:na]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [com.alibaba.dubbo.spring.boot.DubboAutoConfiguration] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:358) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:414) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$2(AbstractAutowireCapableBeanFactory.java:743) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_112]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:742) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:681) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:649) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1604) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:520) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:491) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanNamesForType(OnBeanCondition.java:230) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:223) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:213) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:167) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:142) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-2.2.2.RELEASE.jar:2.2.2.RELEASE]
... 17 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/actuate/endpoint/AbstractEndpoint
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_112]
at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[na:1.8.0_112]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_112]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[na:1.8.0_112]
at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[na:1.8.0_112]
at java.net.URLClassLoader$1.run(URLClassLoader.java:368) ~[na:1.8.0_112]
at java.net.URLClassLoader$1.run(URLClassLoader.java:362) ~[na:1.8.0_112]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_112]
at java.net.URLClassLoader.findClass(URLClassLoader.java:361) ~[na:1.8.0_112]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_112]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_112]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_112]
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_112]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_112]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_112]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
... 33 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.actuate.endpoint.AbstractEndpoint
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_112]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_112]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_112]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_112]
... 49 common frames omitted
2020-01-11 02:23:59.718 WARN 22420 --- [ main] o.s.boot.SpringApplication : Unable to close ApplicationContext
java.lang.IllegalStateException: Failed to introspect Class [com.alibaba.dubbo.spring.boot.DubboAutoConfiguration] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:358) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:414) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$2(AbstractAutowireCapableBeanFactory.java:743) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_112]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:742) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:681) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:649) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1604) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:520) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:491) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:613) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:605) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1242) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:869) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:857) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:844) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:795) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at com.sztxtech.springbootdubboprovider.SpringbootDubboProviderApplication.main(SpringbootDubboProviderApplication.java:12) [classes/:na]
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/actuate/endpoint/AbstractEndpoint
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_112]
at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[na:1.8.0_112]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_112]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[na:1.8.0_112]
at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[na:1.8.0_112]
at java.net.URLClassLoader$1.run(URLClassLoader.java:368) ~[na:1.8.0_112]
at java.net.URLClassLoader$1.run(URLClassLoader.java:362) ~[na:1.8.0_112]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_112]
at java.net.URLClassLoader.findClass(URLClassLoader.java:361) ~[na:1.8.0_112]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_112]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_112]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_112]
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_112]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_112]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_112]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
... 21 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.actuate.endpoint.AbstractEndpoint
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_112]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_112]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_112]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_112]
... 37 common frames omitted
Process finished with exit code 1
(2) 改用Dubbo 2.0.0 之後，再次運行啓動類依然報錯，信息如下：
████████▄ ███ █▄ ▀█████████▄ ▀█████████▄ ▄██████▄
███ ▀███ ███ ███ ███ ███ ███ ███ ███ ███
███ ███ ███ ███ ███ ███ ███ ███ ███ ███
███ ███ ███ ███ ▄███▄▄▄██▀ ▄███▄▄▄██▀ ███ ███
███ ███ ███ ███ ▀▀███▀▀▀██▄ ▀▀███▀▀▀██▄ ███ ███
███ ███ ███ ███ ███ ██▄ ███ ██▄ ███ ███
███ ▄███ ███ ███ ███ ███ ███ ███ ███ ███
████████▀ ████████▀ ▄█████████▀ ▄█████████▀ ▀██████▀
:: Dubbo :: (v2.6.0)
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.2.RELEASE)
2020-01-11 02:41:46.391 INFO 16860 --- [ main] c.s.s.SpringbootDubboProviderApplication : Starting SpringbootDubboProviderApplication on DESKTOP-GavinLee with PID 16860 (E:\workspace\SpringBootProject\springboot-dubbo-provider\target\classes started by Gavin Lee in E:\workspace\SpringBootProject)
2020-01-11 02:41:46.394 INFO 16860 --- [ main] c.s.s.SpringbootDubboProviderApplication : No active profile set, falling back to default profiles: default
2020-01-11 02:41:47.430 INFO 16860 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'spring.dubbo-com.alibaba.dubbo.spring.boot.DubboProperties' of type [com.alibaba.dubbo.spring.boot.DubboProperties] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-01-11 02:41:47.436 INFO 16860 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-01-11 02:41:47.454 INFO 16860 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'com.alibaba.dubbo.spring.boot.DubboConsumerAutoConfiguration' of type [com.alibaba.dubbo.spring.boot.DubboConsumerAutoConfiguration$$EnhancerBySpringCGLIB$$516f68c] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-01-11 02:41:47.635 INFO 16860 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8090 (http)
2020-01-11 02:41:47.643 INFO 16860 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-01-11 02:41:47.643 INFO 16860 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.29]
2020-01-11 02:41:47.719 INFO 16860 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-01-11 02:41:47.719 INFO 16860 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1260 ms
2020-01-11 02:41:48.079 INFO 16860 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-01-11 02:41:48.324 WARN 16860 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.alibaba.dubbo.spring.boot.DubboProviderAutoConfiguration': Invocation of init method failed; nested exception is java.lang.IllegalStateException: ApplicationConfig.application == null
2020-01-11 02:41:48.325 INFO 16860 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
2020-01-11 02:41:48.328 INFO 16860 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2020-01-11 02:41:48.345 INFO 16860 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-01-11 02:41:48.355 ERROR 16860 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.alibaba.dubbo.spring.boot.DubboProviderAutoConfiguration': Invocation of init method failed; nested exception is java.lang.IllegalStateException: ApplicationConfig.application == null
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:160) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:416) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1788) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at com.sztxtech.springbootdubboprovider.SpringbootDubboProviderApplication.main(SpringbootDubboProviderApplication.java:12) [classes/:na]
Caused by: java.lang.IllegalStateException: ApplicationConfig.application == null
at com.alibaba.dubbo.config.AbstractConfig.appendParameters(AbstractConfig.java:245) ~[dubbo-2.6.0.jar:2.6.0]
at com.alibaba.dubbo.config.AbstractConfig.appendParameters(AbstractConfig.java:180) ~[dubbo-2.6.0.jar:2.6.0]
at com.alibaba.dubbo.config.AbstractInterfaceConfig.loadRegistries(AbstractInterfaceConfig.java:175) ~[dubbo-2.6.0.jar:2.6.0]
at com.alibaba.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:355) ~[dubbo-2.6.0.jar:2.6.0]
at com.alibaba.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:316) ~[dubbo-2.6.0.jar:2.6.0]
at com.alibaba.dubbo.config.ServiceConfig.export(ServiceConfig.java:215) ~[dubbo-2.6.0.jar:2.6.0]
at com.alibaba.dubbo.spring.boot.DubboProviderAutoConfiguration.initProviderBean(DubboProviderAutoConfiguration.java:84) ~[dubbo-spring-boot-starter-2.0.0.jar:na]
at com.alibaba.dubbo.spring.boot.DubboProviderAutoConfiguration.init(DubboProviderAutoConfiguration.java:45) ~[dubbo-spring-boot-starter-2.0.0.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_112]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_112]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_112]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_112]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:389) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:333) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:157) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
... 18 common frames omitted
Caused by: java.lang.IllegalStateException: ApplicationConfig.application == null
at com.alibaba.dubbo.config.AbstractConfig.appendParameters(AbstractConfig.java:230) ~[dubbo-2.6.0.jar:2.6.0]
... 32 common frames omitted
Process finished with exit code 1
百度搜索之後得知其原因是配置文件中 Dubbo的配置信息有誤，原始配置如下：
# Dubbo配置
spring.dubbo.appname=springboot-dubbo-provider
spring.dubbo.registry=zookeeper://localhost:2181
修改後的配置如下：
# Dubbo配置
spring.application.name=springboot-dubbo-provider
spring.dubbo.registry=zookeeper://localhost:2181
以上兩個問題處理完畢後，運行正常並且在Zookeeper註冊成功：
