I have a small application that runs on Heroku and it has worked for many years…
Now for the first time, without any apparent reason, I got a single 500 error with this message:
ActionView::Template::Error (No space left on device @ dir_s_mkdir - /app/tmp/cache/C61/E91):
It was just one failed request, then everything worked normally. I don’t know why.
Is there any way to prevent errors like that in the future?