question Spring dosya yükleme rest sorunu

Uygulama içinden response döndürdüğüm zaman aşağıdaki hatayı alıyorum. Controller içindeki metoddan debug yaptığım zaman herşey normal görünüyor. İşlemler bittiği zaman dönen response da aşağıdaki hatayı alıyorum.

• Circular view path [upload]: would dispatch back to the current handler URL [/upload] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
• “Error resolving template \”upload\”, template might not exist or might not be accessible by any of the configured Template Resolvers

@Controller
public class FileUploadController {
    
   private static final Logger logger = LoggerFactory.getLogger(FileUploadController.class); 
    
   @Autowired
   private FileStorageService fileStorageService;

   @Autowired
   private UploadFileResourceAssembler uploadFileResourceAssembler;
    
      @ApiOperation(notes = "Upload a file", value = "Upload a file", nickname = "post_File")
        @ApiResponses({@ApiResponse(code = 201, message = "Uploaded", response = UploadFileResponse.class),
                @ApiResponse(code = 400, message = "A file upload failed", response = Object.class)})
        @RequestMapping(path = "/upload", method = RequestMethod.POST)
        public Resource<UploadFileResponse> uploadFile(@RequestParam("file") MultipartFile file, @RequestHeader(value = USERNAME) String username) {

            String fileName = fileStorageService.storeFile(file);
            String fileDownloadUri = null;
            try {
                fileDownloadUri = ServletUriComponentsBuilder.fromCurrentContextPath()
                        .path(fileStorageService.loadFileAsResource(fileName).getFile().getAbsolutePath()).path(fileName)
                        .toUriString();
            } catch (IOException e) {
                e.printStackTrace();
            }

            UploadFileResponse createdResource = new UploadFileResponse(fileName, fileDownloadUri, file.getContentType(), file.getSize());

            return uploadFileResourceAssembler.toResource(createdResource);

        }
}