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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2019/04/26 04:01:54 UTC
[GitHub] [incubator-dubbo-samples] zhaixiaoxiang opened a new issue #75:
update dubbo version to 2.7.1 for 'snakeyaml' not found in 2.7.0
zhaixiaoxiang opened a new issue #75: update dubbo version to 2.7.1 for 'snakeyaml' not found in 2.7.0
URL: https://github.com/apache/incubator-dubbo-samples/issues/75
When we run MetadataConfigcenterProvider.main(), then we get failures as following, because 2.7.0 doesn't contains `snakeyaml` jar(But actually I don't know the reason, because dubbo-cluster has already contains 'snakeyaml').
This is the exception stack:
```
Exception in thread "main" java.lang.IllegalStateException: Extension instance(name: registry, class: interface org.apache.dubbo.rpc.Protocol) could not be instantiated: org/yaml/snakeyaml/constructor/BaseConstructor
at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:539)
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:393)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:347)
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:883)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)
at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:84)
at org.apache.dubbo.samples.metadatareport.configcenter.MetadataConfigcenterProvider.main(MetadataConfigcenterProvider.java:45)
Caused by: java.lang.NoClassDefFoundError: org/yaml/snakeyaml/constructor/BaseConstructor
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$ProviderConfigurationListener.<init>(RegistryProtocol.java:577)
at org.apache.dubbo.registry.integration.RegistryProtocol.<init>(RegistryProtocol.java:98)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:526)
... 18 more
Caused by: java.lang.ClassNotFoundException: org.yaml.snakeyaml.constructor.BaseConstructor
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 28 more
```
After I update dubbo to 2.7.1, we could find `snakeyaml` in maven dependencies, but the version of `snakeyaml` is not correct, it use the dependency from `spring-boot-dependencies`, as following:
because the level of `snakeyaml` in `spring-boot-dependencies` is high than `dubbo-dependencies-bom`, so maven choose the wrong version 1.17 from the former.
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