chenghb606

fate-serving 2.15推理一直没有结果

2

fate-serving搭建好后，服务检测所有服务正常，推理接口也成功返回，但是每次推理结果都为空

### Search before asking - [x] I had searched in the [issues](https://github.com/DTStack/chunjun/issues) and found no similar question. - [x] I had googled my question but i didn't get any help....

[hotfix] ftp writer format null

1

## Purpose of this pull request ## Which issue you fix Fixes # (issue). ## Checklist: - [ ] I have executed the **'mvn spotless:apply'** command to format my code....