springboot整合dubbo服务启动报错

Question

SpringBoot1.5.1,Dubbo 2..8.4,JDK 1.8.0_171

zookeeper确定是启动的。

provider配置如下：

 <!--定义了提供方应用信息，用于计算依赖关系；在 dubbo-admin 或 dubbo-monitor 会显示这个名字，方便辨识-->
    <dubbo:application name="demotest-provider" owner="programmer" organization="dubbox"/>
    <!--使用 zookeeper 注册中心暴露服务，注意要先开启 zookeeper-->
    <dubbo:registry address="zookeeper://localhost:2181"/>
    <!-- 用dubbo协议在20880端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20880" />

    <!--使用 dubbo 协议实现定义好的接口-->
    <dubbo:service interface="cn.kaison.xblog.system.api.service.SystemService" ref="systemService" protocol="dubbo"></dubbo:service>

    <!--具体实现该接口的 bean-->
    <bean id="demoService" class="cn.kaison.xblog.system.provider.serviceImpl.SystemServiceImpl"></bean>

项目结构：

启动后报错如下：
2018-04-20 00:43:04.775 WARN 18261 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cn.kaison.xblog.system.api.service.SystemService': Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError
2018-04-20 00:43:04.779 WARN 18261 --- [ main] o.s.boot.SpringApplication : Error handling failed (Error creating bean with name 'cn.kaison.xblog.system.api.service.SystemService': Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class com.alibaba.dubbo.config.spring.ServiceBean)
2018-04-20 00:43:04.789 ERROR 18261 --- [ main] o.s.boot.SpringApplication : Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cn.kaison.xblog.system.api.service.SystemService': Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1155) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) ~[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) ~[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) ~[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at cn.kaison.xblog.system.provider.SysProviderApplication.main(SysProviderApplication.java:30) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na]
Caused by: java.lang.ExceptionInInitializerError: null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_144]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_144]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_144]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_144]
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:142) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1147) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
... 20 common frames omitted
Caused by: java.lang.IllegalStateException: fail to create adaptive instance: java.lang.IllegalStateException: Can not create adaptive extenstion interface com.alibaba.dubbo.rpc.Protocol, cause: Failed to load extension class(interface: interface com.alibaba.dubbo.common.compiler.Compiler, class line: com.alibaba.dubbo.common.compiler.support.JavassistCompiler) in jar:file:/Users/xiaohuchen/Documents/_my_soft/mavenrepo/com/alibaba/dubbo/2.8.4/dubbo-2.8.4.jar!/META-INF/dubbo/internal/com.alibaba.dubbo.common.compiler.Compiler, cause: javassist/ClassPath
at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:459) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.config.ServiceConfig.(ServiceConfig.java:62) ~[dubbo-2.8.4.jar:2.8.4]
... 27 common frames omitted
Caused by: java.lang.IllegalStateException: Can not create adaptive extenstion interface com.alibaba.dubbo.rpc.Protocol, cause: Failed to load extension class(interface: interface com.alibaba.dubbo.common.compiler.Compiler, class line: com.alibaba.dubbo.common.compiler.support.JavassistCompiler) in jar:file:/Users/xiaohuchen/Documents/_my_soft/mavenrepo/com/alibaba/dubbo/2.8.4/dubbo-2.8.4.jar!/META-INF/dubbo/internal/com.alibaba.dubbo.common.compiler.Compiler, cause: javassist/ClassPath
at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:723) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:455) ~[dubbo-2.8.4.jar:2.8.4]
... 28 common frames omitted
Caused by: java.lang.IllegalStateException: Failed to load extension class(interface: interface com.alibaba.dubbo.common.compiler.Compiler, class line: com.alibaba.dubbo.common.compiler.support.JavassistCompiler) in jar:file:/Users/xiaohuchen/Documents/_my_soft/mavenrepo/com/alibaba/dubbo/2.8.4/dubbo-2.8.4.jar!/META-INF/dubbo/internal/com.alibaba.dubbo.common.compiler.Compiler, cause: javassist/ClassPath
at com.alibaba.dubbo.common.extension.ExtensionLoader.loadFile(ExtensionLoader.java:685) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.common.extension.ExtensionLoader.loadExtensionClasses(ExtensionLoader.java:591) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.common.extension.ExtensionLoader.getExtensionClasses(ExtensionLoader.java:567) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtensionClass(ExtensionLoader.java:728) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:721) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:455) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtensionClass(ExtensionLoader.java:738) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtensionClass(ExtensionLoader.java:732) ~[dubbo-2.8.4.jar:2.8.4]
at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:721) ~[dubbo-2.8.4.jar:2.8.4]
... 29 common frames omitted
Caused by: java.lang.NoClassDefFoundError: javassist/ClassPath
at java.lang.Class.forName0(Native Method) ~[na:1.8.0_144]
at java.lang.Class.forName(Class.java:348) ~[na:1.8.0_144]
at com.alibaba.dubbo.common.extension.ExtensionLoader.loadFile(ExtensionLoader.java:627) ~[dubbo-2.8.4.jar:2.8.4]
... 37 common frames omitted
Caused by: java.lang.ClassNotFoundException: javassist.ClassPath
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_144]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_144]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) ~[na:1.8.0_144]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_144]
... 40 common frames omitted

Answer 1

    ===========这是你的配置文件部分内容============
    <!--使用 dubbo 协议实现定义好的接口-->
<dubbo:service interface="cn.kaison.xblog.system.api.service.SystemService" ref="systemService" protocol="dubbo"></dubbo:service>

<!--具体实现该接口的 bean-->
<bean id="demoService" class="cn.kaison.xblog.system.provider.serviceImpl.SystemServiceImpl"></bean>
    ===================================================
    暴露服务的时候用的ref名字是 sysrtemService, 而实现服务的bean的名称是 demoService; 
    把这两个名字改成一样就可以了。