RegistryUtils修改后不兼容旧版本

[Matrix0xCC]

这个是不兼容的修改？
修改之后versionRule被忽略了，为何不直接去掉这个参数？
这个类目前被业务使用，升级之后没有发现这个接口的功能变更，导致了一个问题。

Originally posted by @Matrix0xCC in #1600

[liubao68]

你是从哪个版本升级到哪个版本？

[Matrix0xCC]

从1.3.0升级到2.0.1

你是从哪个版本升级到哪个版本？

旧版本逻辑如下

servicecomb-java-chassis/service-registry/src/main/java/org/apache/servicecomb/serviceregistry/registry/AbstractServiceRegistry.java

Lines 226 to 250 in d59f2a6

	public List<MicroserviceInstance> findServiceInstance(String appId, String serviceName,
	String versionRule) {
	MicroserviceInstances instances = findServiceInstances(appId, serviceName, versionRule, null);
	if (instances == null || instances.isMicroserviceNotExist()) {
	return null;
	}
	return instances.getInstancesResponse().getInstances();
	}
	public MicroserviceInstances findServiceInstances(String appId, String serviceName,
	String versionRule, String revision) {
	MicroserviceInstances microserviceInstances = srClient.findServiceInstances(microservice.getServiceId(),
	appId,
	serviceName,
	versionRule,
	revision);
	if (microserviceInstances == null) {
	LOGGER.error("Can not find any instances from service center due to previous errors. service={}/{}/{}",
	appId,
	serviceName,
	versionRule);
	return null;
	}

新版本

servicecomb-java-chassis/service-registry/registry-service-center/src/main/java/org/apache/servicecomb/serviceregistry/RegistryUtils.java

Lines 153 to 163 in ed0fe89

	public static List<MicroserviceInstance> findServiceInstance(String appId, String serviceName,
	String versionRule) {
	MicroserviceCache serviceCache = aggregateServiceRegistryCache.findServiceCache(
	MicroserviceCacheKey.builder()
	.appId(appId).serviceName(serviceName).env(getMicroservice().getEnvironment())
	.build()
	);
	return MicroserviceCacheStatus.SERVICE_NOT_FOUND.equals(serviceCache.getStatus()) ?
	null : serviceCache.getInstances();
	}

[liubao68]

Fixed in 2.1.1