## What Happening
Meta DB 的 QPS 掉 0

## Related Issues or Alerts
> Parse issue or alert link 

## Diagnosis
* ensure MetaDB Up and Running
* ensure Central Up and Running
* 检查 Central 和 MetaDB 之间的网络通信

## Solution

> How to fixes the problem

## Post-Check
修复后报警会自动修复