File upload issue using attribute fileUploadField

General
1

We have write the code following for file upload

<fileUploadField id="fileUploadFieldId" uploadText="Select File" fileNameVisible="false"
                                             maxFileSize="1000000"
                                             classNames="uploadHover"/>

while uploading file we getting the following error on browser console

generated-flow-imports-528b2e8a.js:12206 POST https://localhost:8080/sample-file-upload/VAADIN/dynamic/resource/0/d403e3ca-88f2-43e7-9cf9-3cf693b82948/upload 500 (Internal Server Error)

2

Anything on the server log? That browser error just says there was an internal server error handling the upload.

3

At server end nothing any thing printing in logs file. This issue is getting while selecting the file. This issue is getting on those PDF file. for e.g. I have multiple images and this all images adding create single pdf. and try to upload we getting this issue.

4

Is there something on the network tab of the browser developer toos?

5

it showing same 500 internal server error in network tab too.

6

Then you can be confident it’s not a browser issue, at least. I can think of three options:

  1. something on the network level, such as a firewall, is blocking the request (although http 500 would be a weird error code to return)
  2. something on the server, but not in your application code, is not handling the request correctly and failing but not logging anything. Could be a security configuration or something like that.
  3. something in your application code on the server that’s handling the upload is failing, but in a way that’s not logging anything