I mounted a remote file system using sshfs (version 2.8.4)
sshfs -o allow_root firstname.lastname@example.org: ./example
but unmounting it fails
> fusermount -u example umount: /home/joeuser/example: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1))
Any ideas as to what might be causing this error and how one might fix it?