MicronautHttpData cannot delete temporary files on Windows

[loicmathieu]

Expected Behavior

Temporary files created by file upload should be deleted on Windows

Actual Behaviour

On Windows 10 (it works fine on Linux), the temporary file created by a file upload is not deleted, increasing the disk size.
Moreover, a warning is issued:

Steps To Reproduce

The endpoint where we upload the file is the following:

@ExecuteOn(TaskExecutors.IO)
    @Post(uri = "/{namespace}/{id}", consumes = MediaType.MULTIPART_FORM_DATA)
    public Execution create(
        @Parameter(description = "The inputs") HttpRequest<?> inputs, 
        @Parameter(description = "The inputs of type file") @Nullable @Part Publisher<StreamingFileUpload> files
    ) throws IOException {
    }

The files are process like that:

 Map<String, String> uploads = Flux.from(files)
            .subscribeOn(Schedulers.boundedElastic())
            .map(throwFunction(file -> {
                File tempFile = File.createTempFile(file.getFilename() + "_", ".upl");
                Publisher<Boolean> uploadPublisher = file.transferTo(tempFile);
                Boolean bool = Mono.from(uploadPublisher).block();

                if (Boolean.FALSE.equals(bool)) {
                    throw new RuntimeException("Can't upload");
                }

                URI from = storageInterface.from(execution, file.getFilename(), tempFile);
                //noinspection ResultOfMethodCallIgnored
                tempFile.delete();

                return new AbstractMap.SimpleEntry<>(
                    file.getFilename(),
                    from.toString()
                );
            }))
            .collectMap(AbstractMap.SimpleEntry::getKey, AbstractMap.SimpleEntry::getValue)
            .block();

Environment Information

• OS: Windows 10
• Java 17

Example Application

No response

Version

4.3.4

[yawkat]

I don't think we can do much about this if we can't delete files we created.