some exceptions throw in DataBaseSessionManagerTest

- [ ] I have searched the [issues](https://github.com/seata/seata/issues) of this repository and believe that this is not a duplicate.

### Ⅰ. Issue Description
https://github.com/seata/seata/runs/6793237107?check_suite_focus=true

### Ⅱ. Describe what happened

If there is an exception, please attach the exception trace:

```
Just paste your stack trace here!
```

### Ⅲ. Describe what you expected to happen

### Ⅳ. How to reproduce it (as minimally and precisely as possible)

1. xxx
2. xxx
3. xxx

### Ⅴ. Anything else we need to know?

### Ⅵ. Environment:

- JDK version :
- Seata version:
- OS :
- Others:

Start with DataBaseSessionManagerTest and inspect the linked GitHub Actions run for the exceptions shown in the issue image. Reproduce the failure locally if possible, identify the failing test behavior, and confirm the test completes without those exceptions in CI.

Written by the indexing model from the issue text.