I'm experiencing same problem on two different computers, running Ubuntu 14.04 LTS. I am copying from server (also 14.04) over SSHFS large amount of data and files (few gigabytes). One computer is connected via LAN, second is over internet.
Most of the times everything is OK. Data are copied and everything works as expected. But sometimes during data copying I get "Software caused connection abort" error and process ends. And mounted SSHFS gets into "frozen" state. And the only thing which helps is manually doing `umount /mnt/share' and 'mount /mnt/share'.
I understand that some things may happen on network, that sometimes packet get lost and connection is dropped. But I would like to automatically handle this situation, so that "frozen" share is remounted automatically when it is needed.
Is there any simple solution to this ?
EDIT: I am using this SSHFS options in /etc/fstab: