在properties里面配置多个
dubbo.registry.address=xxxxxx
dubbo.registry.aaa.address=xxxxxx
在xml里面配置
<dubbo:reference id="xx" interface="xxxx" version="1.0.0" registry="aaa"/>
就会报错 Too much registries found
实际上配置的dubbo.registry.aaa.address=xxxxxx 并不能根据aaa来匹配
![image](https://user-images.githubusercontent.com/54841788/68372350-9d4e9700-017b-11ea-95c9-425b66cce6fe.png)

org.apache.dubbo.config.AbstractInterfaceConfig.convertRegistryIdsToRegistries()
if (((List)tmpRegistries).size() > ids.length) {
                throw new IllegalStateException("Too much registries found, the registries assigned to this service are :" + this.registryIds + ", but got " + ((List)tmpRegistries).size() + " registries!");
            }
是不是应该需要在 tmpRegistries 里面根据 id 取对应的 Registries
this.generic = generic;
        } else {
            throw new IllegalArgumentException("Unsupported generic type " + generic);
        }
    }
    @Override
    public void setMock(Boolean mock) {
        throw new IllegalArgumentException("mock doesn't support on provider side");
    }
    @Override
    public void setMock(String mock) {
        throw new IllegalArgumentException("mock doesn't support on provider side");
    }
    public ServiceMetadata getServiceMetadata() {
        return serviceMetadata;
    }
    /**
     * @deprecated Replace to getProtocols()
     */
    @Deprecated
    public List<ProviderConfig> getProviders() {
        return convertProtocolToProvider(protocols);
    }
    /**
     * @deprecated Replace to setProtocols()
     */
    @Deprecated
    public void setProviders(List<ProviderConfig> providers) {
        this.protocols = convertProviderToProtocol(providers);
    }