Re: unrecoverable ftp timeout

[Joerg Thuemmler <listen vordruckleitverlag de>]

Am 05.09.2018 um 10:12 schrieb wwp:
> Hello Joerg,
>
>
> On Wed, 05 Sep 2018 09:50:09 +0200 Joerg Thuemmler <listen vordruckleitverlag de> wrote:
>
> > Am 03.09.2018 um 11:34 schrieb wwp:
> > > Hello!
> > >
> > > there's something I'm experiencing quite frequently now, I'm not sure I
> > > was facing this behaviour w/ former versions: it's losing the FTP
> > > connection after a while being inactive then there is no way to free the
> > > VFs from the 'Active VFS directories' (it's listed in) and there is no
> > > way to re-instantiate the connection again.
> > >
> > > If I try from the 'Directory hotlist', I get a:
> > >     Cannot chdir to "/ftp://....";
> > >     Remote I/O error (121))
> > > if I try from 'FTP link...', I get only:
> > >     Cannot chdir to "/ftp://....";
> > >
> > > The only way I've found to reconnect to a lost FTP connection is
> > > restarting mc, which is not convenient nor expected.
> > >
> > > mc 4.8.1 compiled from the sources, on am up-to-date CentOS7 box:
> > > $ mc --version
> > > GNU Midnight Commander 4.8.21
> > > Built with GLib 2.54.2
> > > Using the S-Lang library with terminfo database
> > > With builtin Editor
> > > With subshell support as default
> > > With support for background operations
> > > With mouse support on xterm and Linux console
> > > With support for X11 events
> > > With internationalization support
> > > With multiple codepages support
> > > Virtual File Systems: cpiofs, tarfs, sfs, extfs, ftpfs, sftpfs, fish, smbfs
> > > Data types: char: 8; int: 32; long: 64; void *: 64; size_t: 64; off_t: 64;
> > >
> > >
> > > Regards,
> [snip]
> > Also I noted ftp servers, which do block the connection after some idle time and if you try to use this connection, 
> > they want you to reconnect and to put in your password once more. Mc caches your pw and resends it, but the new 
> > connection is started in the ftp users root dir (on the ftp server) again, not in the dir you last used. That may 
> > confuse the vfs system, but it's a problem connected with the ftp server's usual behavior (mc could resend the 
> > "cd" commands then after reconnection, dunno whether it's possible to cache last dir before timeout 
> > disconnect).
>
> I experience this specific behaviour quite often (back to root or
> parent folder).
>
>
> [snip]
> > I would try to get a later timeout on the used ftp server, as I believe it's an old "feature" and will not be 
> > changed next time, espacially as sftp will become a more important ftp replacing... Maybe you should change some other 
> > properties of your ftp servers making trouble if you try to re-connect. But this depends on ftp server program used.
>
> I'm afraid I can't change anything on the FTP server side, it's not
> mine at all.. All I know is that mc is not behaving correctly (and
> possibly differently than "before"?) - I don't face such issues w/
> filezilla against the same FTP servers.
>
>
> Regards,
>
>
>
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Hi,

filezilla is disconnecting too after timeout? AFAIK it has a 
"heartbeat"-feature preventing disconnects by timeout. That was to be my 
next idea: run some "heartbeat" on your side, e.g. a "ls" cmd via ftp to 
prevent from connection timeouts...

yes, it's a "quick & dirty" workaround, but IMHO the "reconnect" problem 
is in mc since I'm using it...

regards

--
Joerg Thuemmler