Re: Emacs Hangs on Filesystem Operations on Stale NFS

[Alexander Shukaev]

On 2018-06-11 14:40, Andreas Schwab wrote:
> On Jun 11 2018, Alexander Shukaev <address@hidden> wrote:
>
> > signal.signal(signal.SIGALRM, alarm_handler)
> > signal.alarm(3)
> > try:
> >   proc = subprocess.call('stat ' + path,
> >                shell=True,
> >                stderr=subprocess.PIPE,
> >                stdout=subprocess.PIPE)
> >   stdoutdata, stderrdata = proc.communicate()
> >   signal.alarm(0)
> > except Alarm:
> >   print "Timed out after 3 seconds..."
>
> How do you know that 3 seconds is enough?
>
> Andreas.

You don't know.  You just decide that it's maximum tolerable for 
you/your setup/hardware/connection/preferences/whatever, otherwise you 
are 99.(9)% sure that something is wrong somewhere with your system, but 
you don't give up your Emacs instance for that and rather get indicated 
that there might be a potential problem.

P.S. How did people know that 2 hours would be enough for TCP keepalive?