IOError: No space left on device - which device?

Question

I\'m uploading a small file (8.5 Mb) to a flask test server.

When the file finishes uploading, the server reports:

    File \"/home/ubuntu/.virtualenvs/e         


        

Answer 1

@Tom Hunt's comment was on the right track.

This unix SE answer explains what happened.

As a protection against low disc space, some daemons automatically "shadows" the current /tmp/ dir with a ram disc if the the root partition runs out of disc space. Sadly there's no automatic reversion of that process once enough disc space is free again.

I unmounted /tmp directory and followed Nitesh's suggestion:

sudo umount /tmp
sudo echo 'MINTMPKB=0' > sudo /etc/default/mountoverflowtmp

and now uploads are working properly.