小明的个人博客
前言:
最近在用springboot + dubbo框架搭建一个微服务应用,经历了一系列的mavne配置之后,莫名其妙的出现了以上异常,但不会影响项目正常启动和运行。但拥有强迫症的我。。。
异常信息：
Cannot create property=configs for JavaBean=org.apache.dubbo.rpc.cluster.configurator.parser.model.ConfiguratorConfig@52fec840
in 'string', line 1, column 1:
configs:
^
Can't construct a java object for tag:yaml.org,2002:org.apache.dubbo.admin.model.adapter.BalancingDTO2OverrideConfigAdapter; exception=Class not found: org.apache.dubbo.admin.model.adapter.BalancingDTO2OverrideConfigAdapter
in 'string', line 2, column 3:
- !!org.apache.dubbo.admin.model.a ...
^
in 'string', line 2, column 1:
- !!org.apache.dubbo.admin.model ...
^
at org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.constructJavaBean2ndStep(Constructor.java:268)
at org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.construct(Constructor.java:149)
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:308)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:207)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:196)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:161)
at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:147)
at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:524)
at org.yaml.snakeyaml.Yaml.load(Yaml.java:437)
at org.apache.dubbo.rpc.cluster.configurator.parser.ConfigParser.parseObject(ConfigParser.java:62)
at org.apache.dubbo.rpc.cluster.configurator.parser.ConfigParser.parseConfigurators(ConfigParser.java:41)
at org.apache.dubbo.registry.integration.AbstractConfiguratorListener.process(AbstractConfiguratorListener.java:62)
at org.apache.dubbo.registry.integration.AbstractConfiguratorListener.initWith(AbstractConfiguratorListener.java:46)
at org.apache.dubbo.registry.integration.RegistryProtocol$ProviderConfigurationListener.(RegistryProtocol.java:577)
at org.apache.dubbo.registry.integration.RegistryProtocol.(RegistryProtocol.java:98)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:526)
at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:344)
at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java)
at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:553)
at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:402)
at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:363)
at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:345)
at org.apache.dubbo.config.spring.ServiceBean.export(ServiceBean.java:318)
at org.apache.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:112)
at org.apache.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:58)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:400)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:354)
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:888)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:161)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243)
at com.laFerrari.comment.sync.SyncApplication.main(SyncApplication.java:27)
Caused by: Can't construct a java object for tag:yaml.org,2002:org.apache.dubbo.admin.model.adapter.BalancingDTO2OverrideConfigAdapter; exception=Class not found: org.apache.dubbo.admin.model.adapter.BalancingDTO2OverrideConfigAdapter
in 'string', line 2, column 3:
- !!org.apache.dubbo.admin.model.a ...
^
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:313)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:207)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:196)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructSequenceStep2(BaseConstructor.java:373)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructSequence(BaseConstructor.java:357)
at org.yaml.snakeyaml.constructor.Constructor$ConstructSequence.construct(Constructor.java:516)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:207)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:196)
at org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.newInstance(Constructor.java:281)
at org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.constructJavaBean2ndStep(Constructor.java:246)
... 44 more
Caused by: org.yaml.snakeyaml.error.YAMLException: Class not found: org.apache.dubbo.admin.model.adapter.BalancingDTO2OverrideConfigAdapter
at org.yaml.snakeyaml.constructor.Constructor.getClassForNode(Constructor.java:642)
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.getConstructor(Constructor.java:298)
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:308)
... 53 more
异常分析：
这个错误可以说是非常直观：
org.yaml.snakeyaml.error.YAMLException: Class not found: org.apache.dubbo.admin.model.adapter.BalancingDTO2OverrideConfigAdapter
找不到BalancingDTO2OverrideConfigAdapter这个类
第一步：google搜索 "Class not found: org.apache.dubbo.admin.model.adapter.BalancingDTO2OverrideConfigAdapter" 基本找不到对应的内容
QQ截图20190509104831.png
第二步：google搜索" Can't construct a java object for tag:yaml.org,2002"
小明的个人博客