* bug#30522: offloading requires guile-readline on the remote system
@ 2018-02-19 13:48 Marius Bakke
2018-02-19 15:35 ` Ludovic Courtès
0 siblings, 1 reply; 9+ messages in thread
From: Marius Bakke @ 2018-02-19 13:48 UTC (permalink / raw)
To: 30522
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Hello!
After reconfiguring a remote machine on latest 'master' (post recent
core-updates merge), I found that offloading to it would just "hang".
After some debugging I found that `guile --listen` failed to import
(ice-9 readline). Installing guile-readline for the offload user did
the trick.
It would be great to make Guile fail gracefully and print a message
about readline being unavailable instead of just looping endlessly. Or
at the very least document the requirement.
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^ permalink raw reply [flat|nested] 9+ messages in thread
* bug#30522: offloading requires guile-readline on the remote system
2018-02-19 13:48 bug#30522: offloading requires guile-readline on the remote system Marius Bakke
@ 2018-02-19 15:35 ` Ludovic Courtès
2018-02-19 16:11 ` Marius Bakke
0 siblings, 1 reply; 9+ messages in thread
From: Ludovic Courtès @ 2018-02-19 15:35 UTC (permalink / raw)
To: Marius Bakke; +Cc: 30522
Hi Marius,
Marius Bakke <mbakke@fastmail.com> skribis:
> After reconfiguring a remote machine on latest 'master' (post recent
> core-updates merge), I found that offloading to it would just "hang".
>
> After some debugging I found that `guile --listen` failed to import
> (ice-9 readline). Installing guile-readline for the offload user did
> the trick.
Could it be that ~/.guile on that machine imports (ice-9 readline)?
(On GuixSD the default ~/.guile used to import it unconditionally.)
Otherwise I see no reason why things would go wrong. For instance, this
appears to work fine:
--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix environment --ad-hoc guile -C -- guile --listen
substitute: updating list of substitutes from 'https://berlin.guixsd.org'... 100.0%
substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 100.0%
The following derivations will be built:
/gnu/store/5y0fr7fbmpvbry09ks7i0fqaqvrl2yjn-profile.drv
/gnu/store/ffp06ykw5qjlj3c2drys30nf73lgf6h4-info-dir.drv
/gnu/store/209l6232jpic6cj90ijss2122xz743ia-fonts-dir.drv
/gnu/store/1hj38jwa8bhkgwxxhrflbaslkql37db5-ca-certificate-bundle.drv
/gnu/store/3hk4zjhl5g3i94yfdw5mzmbyhfrwqwxx-manual-database.drv
Creating manual page database...
1 entries processed in 0.1 s
GNU Guile 2.2.3
Copyright (C) 1995-2017 Free Software Foundation, Inc.
Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.
Enter `,help' for help.
scheme@(guile-user)> +
$1 = #<procedure + (#:optional _ _ . _)>
scheme@(guile-user)> -
$2 = #<procedure - (#:optional _ _ . _)>
--8<---------------cut here---------------end--------------->8---
Thanks,
Ludo’.
^ permalink raw reply [flat|nested] 9+ messages in thread
* bug#30522: offloading requires guile-readline on the remote system
2018-02-19 15:35 ` Ludovic Courtès
@ 2018-02-19 16:11 ` Marius Bakke
2018-02-19 20:31 ` Ludovic Courtès
0 siblings, 1 reply; 9+ messages in thread
From: Marius Bakke @ 2018-02-19 16:11 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 30522-done
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Ludovic Courtès <ludo@gnu.org> writes:
> Hi Marius,
>
> Marius Bakke <mbakke@fastmail.com> skribis:
>
>> After reconfiguring a remote machine on latest 'master' (post recent
>> core-updates merge), I found that offloading to it would just "hang".
>>
>> After some debugging I found that `guile --listen` failed to import
>> (ice-9 readline). Installing guile-readline for the offload user did
>> the trick.
>
> Could it be that ~/.guile on that machine imports (ice-9 readline)?
> (On GuixSD the default ~/.guile used to import it unconditionally.)
Ah, good catch! This was using the default .guile from before
2ba2c98d8aa695cce608313833a36c61b0fb3428. I have verified that copying
the new .guile from /etc/skel works even without guile-readline
installed.
It would still be good with a better failure mode, but I'll file this
under "pebkac" for now.
Thanks!
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^ permalink raw reply [flat|nested] 9+ messages in thread
* bug#30522: offloading requires guile-readline on the remote system
2018-02-19 16:11 ` Marius Bakke
@ 2018-02-19 20:31 ` Ludovic Courtès
2018-02-20 17:33 ` Marius Bakke
0 siblings, 1 reply; 9+ messages in thread
From: Ludovic Courtès @ 2018-02-19 20:31 UTC (permalink / raw)
To: Marius Bakke; +Cc: 30522-done
Heya,
Marius Bakke <mbakke@fastmail.com> skribis:
> Ludovic Courtès <ludo@gnu.org> writes:
>
>> Hi Marius,
>>
>> Marius Bakke <mbakke@fastmail.com> skribis:
>>
>>> After reconfiguring a remote machine on latest 'master' (post recent
>>> core-updates merge), I found that offloading to it would just "hang".
>>>
>>> After some debugging I found that `guile --listen` failed to import
>>> (ice-9 readline). Installing guile-readline for the offload user did
>>> the trick.
>>
>> Could it be that ~/.guile on that machine imports (ice-9 readline)?
>> (On GuixSD the default ~/.guile used to import it unconditionally.)
>
> Ah, good catch! This was using the default .guile from before
> 2ba2c98d8aa695cce608313833a36c61b0fb3428. I have verified that copying
> the new .guile from /etc/skel works even without guile-readline
> installed.
Good.
> It would still be good with a better failure mode, but I'll file this
> under "pebkac" for now.
Yes, I’m surprised it ended up looping. Did you try to strace it or
something to see what was going on? Perhaps guile failed to start
altogether and Guile-SSH kept retrying?
Ludo’.
^ permalink raw reply [flat|nested] 9+ messages in thread
* bug#30522: offloading requires guile-readline on the remote system
2018-02-19 20:31 ` Ludovic Courtès
@ 2018-02-20 17:33 ` Marius Bakke
2018-02-21 22:07 ` bug#30522: Guile-SSH retries upon “guile --listen” failure to start Ludovic Courtès
0 siblings, 1 reply; 9+ messages in thread
From: Marius Bakke @ 2018-02-20 17:33 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 30522-done
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Ludovic Courtès <ludo@gnu.org> writes:
>> It would still be good with a better failure mode, but I'll file this
>> under "pebkac" for now.
>
> Yes, I’m surprised it ended up looping. Did you try to strace it or
> something to see what was going on? Perhaps guile failed to start
> altogether and Guile-SSH kept retrying?
Indeed. Guile-SSH kept trying to start `guile --listen` over and over.
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^ permalink raw reply [flat|nested] 9+ messages in thread
* bug#30522: Guile-SSH retries upon “guile --listen” failure to start
2018-02-20 17:33 ` Marius Bakke
@ 2018-02-21 22:07 ` Ludovic Courtès
2018-02-24 10:52 ` Artyom Poptsov
0 siblings, 1 reply; 9+ messages in thread
From: Ludovic Courtès @ 2018-02-21 22:07 UTC (permalink / raw)
To: Marius Bakke, Artyom Poptsov; +Cc: 30522-done
Hello Artyom & Marius,
Marius Bakke <mbakke@fastmail.com> skribis:
> Ludovic Courtès <ludo@gnu.org> writes:
>
>>> It would still be good with a better failure mode, but I'll file this
>>> under "pebkac" for now.
>>
>> Yes, I’m surprised it ended up looping. Did you try to strace it or
>> something to see what was going on? Perhaps guile failed to start
>> altogether and Guile-SSH kept retrying?
>
> Indeed. Guile-SSH kept trying to start `guile --listen` over and over.
Artyom, do you think we could arrange for Guile-SSH to properly detect
failure to start ‘guile --listen’ and report it instead of retrying?
Perhaps it could check the exit code of ‘guile --listen’ and distinguish
127 (“command not found”) from other exit codes?
(For more context, see <https://bugs.gnu.org/30522>.)
Thanks,
Ludo’.
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2018-03-05 10:12 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-02-19 13:48 bug#30522: offloading requires guile-readline on the remote system Marius Bakke
2018-02-19 15:35 ` Ludovic Courtès
2018-02-19 16:11 ` Marius Bakke
2018-02-19 20:31 ` Ludovic Courtès
2018-02-20 17:33 ` Marius Bakke
2018-02-21 22:07 ` bug#30522: Guile-SSH retries upon “guile --listen” failure to start Ludovic Courtès
2018-02-24 10:52 ` Artyom Poptsov
2018-03-05 2:15 ` Artyom Poptsov
2018-03-05 10:11 ` Ludovic Courtès
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