liubao68 opened a new issue #690:
URL: https://github.com/apache/servicecomb-service-center/issues/690
**Describe the bug**
```
/v4/{project}/registry/instances:
get:
description: |
实例注册后可以根据微服务版本规则或字段条件
发现该微服务的实例。同时会将此微服务版本规则记录到依赖关系中，当发现相同微服务的不同版本规则时，会覆盖已有的依赖关系。
operationId: find
parameters:
- name: x-domain-name
in: header
type: string
default: default
- name: x-resource-revsion
in: header
type: string
description:
客户端缓存的版本号,由上一次请求该API返回Header中获得;如请求版本号不为空且与服务端不匹配则服务端返回其最新的实例集合和版本号;如匹配则服务端返回304状态且Body为空。
- name: X-ConsumerId
```
x-resource-revsion is not a parameter, but a response header.
**To Reproduce**
**Expected behavior**
**Platform And Runtime (please complete the following information):**
**Additional context**
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