Failed to parse multipart servlet request - the request was rejected because no multipart...

Does anyone have any idea why I am getting this boundary error when submitting this multipart file?

Error:

{errCode: 4000, errMsg: "Failed to parse multipart servlet request", timestamp: "01-04-2025 07:26:30"}

Caused by: org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found


Angular 17

importProducts(productId,file:File, tag): Observable<any[]> {

var url = "http://localhost:9100/importProduct/“+productId+"?tag="+tag;
var headers: HttpHeaders = new HttpHeaders();
headers = headers.set('content-type', 'multipart/form-data');
this.http.combineHeaders(headers);
return this.http.post(url, file, 'ImportProducts');

}


Java17

@PostMapping(value = "/importProduct/{product_id}", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public ResponseEntity<Object> importProductList(@PathVariable(value = "product_id") String productId,
@RequestParam(value = "tag") boolean tag, @RequestParam("uploadFile") MultipartFile uploadFile)
throws IOException {


if ((uploadFile.getName() == null) || "".equals(uploadFile.getName())) {
//Error file
} else if (uploadFile.getSize() == 0) {
//Error stream null
} else {
String newFile = uploadFile.getOriginalFilename();
if (tag) {
//Import products process
return new ResponseEntity<>(true, HttpStatus.OK);
}
}
}


Thanks a lot if you can help me and thanks for your time.

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