8MB ... what were the dimension of image ? More than 3000x3000 ? You may had on a memory issue. Do you have any error ? See troubleshooting: http://www.jfileupload.com/products/jfileupload/documentation/tutorials/troubleshooting.html See memory workaround at: http://www.jfileupload.com/products/jima...

First, does it work with HTTP only ?
Second, are you able to open a simple HTML page with HTTPS in your browser ?
If so, then you should try WeakSSL add-on. It allows to disable certificate checks for untrusted SSL certificates.
http://www.jfileupload.com/products/tools/index.html

This error means that JSPUpload is not deployed correctly. process.jsp is not able to find out .class files under WEB-INF/classes. Did you copy these classes ?

I know such request could be annoying in log files. In fact you have to create empty file (and folders) for each HTTP 404 request. No more than 10 empty files should be needed.

This error means that Java runtime cannot load the applet. Did you copy lib/ folder into your server ? You should have something like : applet_ftp.js applet_ftp.html applet_http.js applet_http.html lib/chttpclient.jar lib/clogging.jar lib/cnet.jar lib/ftpimpl.jar lib/httpimpl.jar lib/jfileupload.jar...

Could you remove extra space (after each coma) in whitelist: <PARAM NAME="whitelist" VALUE="*.jpg, *.JPG, *.jpe, *.JPE, *.jpeg, *.JPEG, *.bmp, *.BMP, *.tif, *.TIFF, *.tiff, *.TIFF, *.pnm, *.PNM, *.raw, *.RAW"> becomes: <PARAM NAME="whitelist" VALUE="*.jpg,*.JPG,*.jpe,*.JPE,*.jpeg,*.JPEG,*.bmp,*.BMP,...

No, because "post" follows a successful upload. So, upload need to be completed before sending post request. However, for "resume", the applet send a HTTP HEAD request, not POST so you could filter or test the HTTP method.

Does it help ?

Are you using "resume" or "overwrite" parameter ? Because such parameter make the applet send a first request before upload.

Rename applet_http.js in applet_http_js.php Then update the link in the HTML and it should work.
Notice that you could also copy/paste the JavaScript into the HTML, it should work too.

See "unexcepted HTTP request" section at:
http://www.jfileupload.com/products/jfi ... oting.html