类分层结构
- java.lang.Object
- com.alibaba.dubbo.registry.support.AbstractRegistry (implements com.alibaba.dubbo.registry.Registry)
- com.alibaba.dubbo.registry.support.FailbackRegistry
 
 - com.alibaba.dubbo.registry.support.AbstractRegistryFactory (implements com.alibaba.dubbo.registry.RegistryFactory)
 - com.alibaba.dubbo.registry.support.ConsumerInvokerWrapper<T> (implements com.alibaba.dubbo.rpc.Invoker<T>)
 - com.alibaba.dubbo.registry.support.ProviderConsumerRegTable
 - com.alibaba.dubbo.registry.support.ProviderInvokerWrapper<T> (implements com.alibaba.dubbo.rpc.Invoker<T>)
 - java.lang.Throwable (implements java.io.Serializable)
- java.lang.Exception
- java.lang.RuntimeException
- com.alibaba.dubbo.registry.support.SkipFailbackWrapperException
 
 
 - java.lang.RuntimeException
 
 - java.lang.Exception
 
 - com.alibaba.dubbo.registry.support.AbstractRegistry (implements com.alibaba.dubbo.registry.Registry)