Symfony, Liip Imagine bundle not working on server in prod environment - symfony

Question

I have a project where I keep my uploaded images in src/My/Bundle/Resources/uploads/images/full and use the twig filter imagine_filter to dynamically create thumbnails.
On my local machine it works flawlessly and so does on my server, but there only under the dev environment. When I delete the previously created thumbnails (leaving only the full directory), clear the prod cache and load any web page, the images are not created, their url always remains under media/cache, and the logger gives me the request.ERROR:
"No route found for "GET /uploads/images/avatar/354026c94b773b77ca945b4a6323e15c84102f6b.jpg"" at /<path>/app/cache/prod/classes.php line 1964 {"exception":"[object] (Symfony\\Component\\HttpKernel\\Exception\\NotFoundHttpException: No route found for \"GET /uploads/images/avatar/354026c94b773b77ca945b4a6323e15c84102f6b.jpg\" at /<path>/app/cache/prod/classes.php:1964, Symfony\\Component\\Routing\\Exception\\ResourceNotFoundException: at /<path>/app/cache/prod/appProdUrlMatcher.php:1816
Some additional infos:
I have symlinked src/My/Bundle/Resources/uploads to web/uploads
my config is (thumbnail_min is a custom filter):
liip_imagine:
loaders:
default:
filesystem:
data_root: %kernel.root_dir%/../web/uploads/images/full
resolvers:
default:
web_path:
web_root: %kernel.root_dir%/../web
cache_prefix: /uploads/images
cache: default
filter_sets:
avatar:
quality: 90
filters:
thumbnail_min: { size: 50, mode: inset }
....
full:
quality: 100
permissions are always at least group rw (that's what is needed on the server)

Answer 1

Just experienced a similar problem on my local machine, however still in dev environment.
For me, I was missing group writable permission on the default media/cache folder, which stayed empty after a liip:imagine:cache:remove and page reload. Thus images were linking to empty folder.
To fix, I first made sure that Group was set to Apache's _www (mac) / www-data (linux), e.g.
sudo chgrp -R www-data web/media/cache
Then made sure the folder was set to readable, writable and executable, e.g.
sudo chmod -R g+rwx web/media/cache
Hope this helps...