Symfony 3.1 and OneUpUploaderBundle + Blueimp = UploadListener is not called
Just listen to the right event. Event exchange contains the name of your mapping, in order that you can implement a specific logic to this one that will not affect the others.
Event to this format.
oneup_uploader.post_upload.{mapping}In your case it will give
oneup_uploader.post_upload.galleryFor more informations, please readhttps://github.com/1up-lab/OneupUploaderBundle/blob/master/Resources/doc/events.md