hiSandog opened a new issue, #18562:
URL: https://github.com/apache/dolphinscheduler/issues/18562
### Search before asking
- [x] I searched the existing issues and found no similar report.
### What happened
`FileUtils.writeContent2File` fails when `filePath` is a valid filename
without a parent component, such as `output.txt`.
The method calls `distFile.getParentFile().exists()` unconditionally. For a
parentless relative path, `File.getParentFile()` returns `null`, so the method
throws a `NullPointerException` before it can create the file.
### What you expected to happen
`FileUtils.writeContent2File("test content", "output.txt")` should write the
file in the current working directory and return `true`.
### How to reproduce
On the `dev` branch, call:
```java
FileUtils.writeContent2File("test content", "output.txt");
```
The call dereferences the null result of `getParentFile()` and fails before
opening the output stream.
### Anything else
The parent directory should only be checked or created when
`getParentFile()` is non-null. A proposed fix and regression test are available
in #18408.
### Version
dev
### Are you willing to submit PR?
- [x] Yes, I am willing to submit a PR.
### Code of Conduct
- [x] I agree to follow the project's Code of Conduct.
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