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
@Override
    @Parameter(excluded = true)
    public String getPrefix() {
        return DUBBO + ".service." + interfaceName;
    }
    @Parameter(excluded = true)
    public String getUniqueServiceName() {
        return URL.buildKey(interfaceName, group, version);
    }
    private void computeValidProtocolIds() {
        if (StringUtils.isEmpty(getProtocolIds())) {
            if (getProvider() != null && StringUtils.isNotEmpty(getProvider().getProtocolIds())) {
                setProtocolIds(getProvider().getProtocolIds());
            }
        }
    }
    @Override
    protected void computeValidRegistryIds() {
        super.computeValidRegistryIds();
        if (StringUtils.isEmpty(getRegistryIds())) {
            if (getProvider() != null && StringUtils.isNotEmpty(getProvider().getRegistryIds())) {
                setRegistryIds(getProvider().getRegistryIds());
            }
        }
    }
    public abstract void export();
    public abstract void unexport();
    public abstract boolean isExported();
    public abstract boolean isUnexported();
}