metrics: the num of offline Region is unexpected

Open

#3,558 opened on Apr 1, 2021 3 comments 0 reactions 1 assignee Claimed by @lhy1024 View on GitHub

component/cluster component/metrics severity/moderate type/bug

Description

## Bug Report

### What did you do?

offline 3 store
![image](https://user-images.githubusercontent.com/19542290/113264301-672c2d00-9305-11eb-87ef-48a79f74f8aa.png)

### What did you expect to see?

The num of offline Region gradually decreases from 2400 accompanied by offline

### What did you see instead?

it increased from 200
![image](https://user-images.githubusercontent.com/19542290/113264275-5e3b5b80-9305-11eb-9e07-e78a437349b2.png)

### What version of PD are you using (`pd-server -V`)?

5.0-GA

This issue has not been assessed yet.