Summary

Uploading a JAR just using UPM as described in Updating add-ons by file upload will hang and never complete

Diagnosis

Environment

• Check if nginx or some other proxy is being used in the environment

Cause

Some proxies have Max Body parameters and will respond with 413 (Request Entity Too Large) when attempting to upload files larger than that parameter

On nginx, client_max_body_size parameter has default value of 10M.

Solution

Nginx

Increase client_max_body_size parameter to the suitable size. (e.g 20m)