some unit tests failed in CI

- [ ] 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

some unit tests failed in CI

https://github.com/seata/seata/runs/6472204042?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 the linked GitHub Actions run and identify which unit tests failed and whether the failure is reproducible. The issue names no files, tests, exception, or environment details; done would require a confirmed cause and a CI run in which the affected tests pass.

Written by the indexing model from the issue text.