Re: [sshfs] SSHFS gets stuck if connection is lost

[Thue J. K. <th...@gm...>]

It would be nice if it would do something other than hanging indefinitely.
Whether that is to try to reconnect, or to unmount, is not so important.

Regards, Thue

2011/1/24 Miklos Szeredi <mi...@sz...>

> On Fri, 21 Jan 2011, Thue Janus Kristensen wrote:
> > If I have an SSHFS-mounted filesystem and the established sftp-connection
> > becomes invalid, for example if I restart my router, SSHFS bugs out. For
> > example, if I try to do a ls of the mounted directory, the ls hangs
> forever.
> >
> > Why doesn't SSHFS automatically unmount the now invalid mount point, or
> at
> > least return a read error to ls?
>
> SSHFS doesn't know, it uses ssh, which in turns uses TCP sockets,
> which behave badly in the presense of dynamic IP.
>
> The solution would be to give sshfs a timeout after which it kills the
> hanging ssh connection and starts up a new one.
>
> Returning an error may not be the right thing, the network might just
> be down temporarily.  Unfortunately there's no way to differentiate a
> temporary network outage from a changed IP address in the router,
> which will cause TCP connections to hang "permanently".
>
> Thanks,
> Miklos
>