## What Happening

PD 服务端口探测失败
## Related Issues or Alerts
> Parse issue or alert link 

## Diagnosis
> How to investigate the problem

## Solution

* 检查 PD 服务所在机器是否宕机
* 检查 PD 进程是否存在
* 检查监控 prometheus pod与 PD pod 之间网络是否正常

## Post-Check
> Check issue fixes