RIIIF should return a 404 when an image isn't found, not throw an error.

[jrgriffiniii]

Backtrace

View full backtrace and more info at honeybadger.io

[jrgriffiniii]

It doesn't appear to be the case that this could be handled with a proper 404 response without overriding the ImageController for the riiif Gem. Should riiif be still be being accessed within the production environment for DPUL? If so, I can look to address this by submitting a pull request upstream.

[hackartisan]

It looks like it does 404 at least at one point.
https://github.com/curationexperts/riiif/blob/9dcd95f06f1dbac49cc5fa6eea6b1bc3f224efb9/app/controllers/riiif/images_controller.rb#L18

It seems difficult to proceed on this issue without the honeybadger trace. I propose we close it, as the underlying problem (shared network drive) has been resolved.

[tpendragon]

Sounds good to me