Update Asset Indexes for new files in s3 not working We uploaded a lot of images to the S3 bucket that is connected to our assets in Craft, but when we run "Update Asset Indexes" on the settings page, those images aren't added to the assets in Craft.

I'm pretty sure that the settings for the asset source is correct (images that we upload via Craft are working). And it doesn't seem to be related to a time-out, because we updated the php and nginx settings, and now it finishes after ~70s instead of 60s.

What are we doing wrong? 
Is it even possible to import images this way?
We ended up using this cli tool:
https://github.com/rsanchez/craft-cli

We still had to tweak the php memory limit in the php config: memory_limit 2048M

But eventually we managed to index 21.000+ images this way.