Tramp hangs/freezes when opening some remote files over ssh on Ubuntu 14.04 client.

Tramp hangs/freezes when opening some remote files over ssh on Ubuntu 14.04 client.

[Chris Seberino]

I've confirmed the following problem happens even with emacs -q....

I can ssh to a remote server.

I can traverse remote server directories with local Emacs Tramp.

When I try to open some files it freezes with messages like the following...

   Tramp: Inserting `/ssh:cs@philfour.com:/home/cs/Ws/philfour/mvc/views/booklist.html'...done

I can't see debug output when I add (setq tramp-verbose 500)
to .emacs because when I try to open remote file with Tramp
it freezes?!!?

I found some discussion about issues with Ubuntu 14.04 here:

http://stackoverflow.com/questions/17588136/emacs-24-3-1-tramp-hangs-on-opening-file

I tried adding following to .ssh/config like it said but it didn't fix....

Host philfour.com
ControlMaster auto
ControlPath ~/.ssh/%r@%h:%p
ServerAliveCountMax=30
ServerAliveInterval=5

I suspect this persons Tramp problems on Ubuntu 14.04 are related...

https://stat.ethz.ch/pipermail/ess-help/2014-September/010172.html


Any help great appreciated.

Sincerely,

Chris Seberino

Re: Tramp hangs/freezes when opening some remote files over ssh on Ubuntu 14.04 client.

[Michael Albinus]

Chris Seberino <cseberino@gmail.com> writes:

Hi,

> When I try to open some files it freezes with messages like the following...
>
>    Tramp: Inserting `/ssh:cs@philfour.com:/home/cs/Ws/philfour/mvc/views/booklist.html'...done
>
> I can't see debug output when I add (setq tramp-verbose 500)
> to .emacs because when I try to open remote file with Tramp
> it freezes?!!?

Try C-g (even several times) whether Emacs unfreezes. If it doesn't
help, send the Emacs process the USR2 signal, or the FPE
signal. Sometimes this unfreezes Emacs, and you are able to investigate
the Tramp buffer.

> I found some discussion about issues with Ubuntu 14.04 here:

Well, experience tells that there are a lot of possibilities that Tramp
does not succeed to connect. Often, it is the prompt of the remote shell.

> Any help great appreciated.
>
> Sincerely,
>
> Chris Seberino

Best regards, Michael.

Re: Tramp hangs/freezes when opening some remote files over ssh on Ubuntu 14.04 client.

[Chris Seberino]

> Try C-g (even several times) whether Emacs unfreezes. If it doesn't
> help, send the Emacs process the USR2 signal, or the FPE
> signal. Sometimes this unfreezes Emacs, and you are able to investigate
> the Tramp buffer.

That unfroze it so I could paste the debug info seen below!


> Well, experience tells that there are a lot of possibilities that Tramp
> does not succeed to connect. Often, it is the prompt of the remote shell.

It is true that I had escape codes and other goo in my zsh prompt to make it fancy.  I removed it but still had the same problem.

Here is the end of the tramp debug output...
12:04:00.450008 tramp-get-connection-property (7) # last-cmd-time (21695 59920 391735 558000)
12:04:00.450122 tramp-get-connection-property (7) # process-name nil
12:04:00.450234 tramp-get-connection-property (7) # remote-echo nil
12:04:00.450327 tramp-send-command (6) # ( \cd /home/cs/Ws/philfour/mvc/views/; hg log -l 1 --template \{rev\} about.html </dev/null; echo tramp_exit_status $? )
12:04:00.450420 tramp-get-connection-property (7) # process-name nil
12:04:00.450533 tramp-get-connection-property (7) # chunksize 0
12:04:00.450643 tramp-set-connection-property (7) # last-cmd-time (21695 59920 450595 160000)
12:04:00.450737 tramp-send-string (10) # ( \cd /home/cs/Ws/philfour/mvc/views/; hg log -l 1 --template \{rev\} about.html </dev/null; echo tramp_exit_status $? )
12:04:00.450828 tramp-get-connection-property (7) # process-buffer nil
12:04:00.450962 tramp-get-connection-property (7) # check-remote-echo nil
12:04:00.451062 tramp-get-connection-property (7) # check-remote-echo nil
12:04:00.451165 tramp-accept-process-output (10) # *tramp/ssh cs@philfour.com* run
12:04:00.553303 tramp-accept-process-output (10) # 
WARNING: terminal is not fully functional
12:04:00.553403 tramp-get-connection-property (7) # check-remote-echo nil
12:04:00.553500 tramp-get-connection-property (7) # check-remote-echo nil
12:04:00.553607 tramp-accept-process-output (10) # *tramp/ssh cs@philfour.com* run
12:04:00.553760 tramp-accept-process-output (10) # 
WARNING: terminal is not fully functional

-  (press RETURN)
12:04:00.553859 tramp-get-connection-property (7) # check-remote-echo nil
12:04:00.553964 tramp-get-connection-property (7) # check-remote-echo nil
12:04:00.554074 tramp-accept-process-output (10) # *tramp/ssh cs@philfour.com* run
12:04:01.555315 tramp-accept-process-output (10) # 
WARNING: terminal is not fully functional

-  (press RETURN)
12:04:01.555440 tramp-get-connection-property (7) # check-remote-echo nil
12:04:01.555539 tramp-get-connection-property (7) # check-remote-echo nil
12:04:01.555652 tramp-accept-process-output (10) # *tramp/ssh cs@philfour.com* run
12:04:02.556823 tramp-accept-process-output (10) # 
WARNING: terminal is not fully functional

-  (press RETURN)
12:04:02.556957 tramp-get-connection-property (7) # check-remote-echo nil
12:04:02.557057 tramp-get-connection-property (7) # check-remote-echo nil
12:04:02.557167 tramp-accept-process-output (10) # *tramp/ssh cs@philfour.com* run
12:04:03.364676 tramp-get-connection-property (7) # process-buffer nil
12:04:03.364793 tramp-get-connection-property (7) # process-buffer nil
12:04:03.364929 tramp-get-file-property (8) # / file-truename nil
12:04:03.365022 tramp-flush-file-property (8) # /

Re: Tramp hangs/freezes when opening some remote files over ssh on Ubuntu 14.04 client.

[Chris Seberino]

I just noticed if I do C-g it *unfreezes* things and the file loaded just fine!!!

So the problem isn't that file isn't found or loaded....the problem is it gets
stuck at the 11th hour for some reason!!!

I tried switching from zsh to base with the default shell prompt and still same.