www.jfileupload.com

I some clients who have received this error

Uploading :
DSC_0559.JPG.jpg
(258 925 bytes)
Upload started ...Upload failed : java.net.SocketException: Software caused connection abort: socket write error

The client was uploading a large number of images and had to restart the upload. Is there a setting to allow the clients to continue/resume the upload?

Yes, the applet can automatically attempt to restart upload that failed (for any reason such as network issue, server problem ...). Try to add:
<PARAM NAME="retry" VALUE="5">

Documentation about this parameter is available at:
http://www.jfileupload.com/products/jfi ... _http.html

Does it help ?