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Subject: |
Bandwidth-induced offload timeout abort whole operating |
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Date: |
Sun, 19 Feb 2023 22:28:16 -0500 |
Hi Guix,
I can reproduce this rather easily on my system:
--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix build icedove
The following derivations will be built:
/gnu/store/l6r93asndd0kwv7024iyrl71zd0lbpbq-icedove-102.7.2.drv
/gnu/store/8zi808086b3vlfjrhdm87fgljziwdqx2-icedove-l10n-102.7.2.drv
/gnu/store/v0sq7rb8fk36kjasb27a71z1a27wxb1s-icedove-minimal-102.7.2.drv
process 19542 acquired build slot '/var/guix/offload/localhost:6666/0'
normalized load on machine 'localhost' is 0.08
building /gnu/store/8zi808086b3vlfjrhdm87fgljziwdqx2-icedove-l10n-102.7.2.drv...
process 19548 acquired build slot '/var/guix/offload/localhost:6666/1'
normalized load on machine 'localhost' is 0.08
building
/gnu/store/v0sq7rb8fk36kjasb27a71z1a27wxb1s-icedove-minimal-102.7.2.drv...
guix offload: sending 1 store item (558 MiB) to 'localhost'...
exporting path
`/gnu/store/bwb5hcdyzgq16kmbsva7ax0zq6lzg78z-icedove-102.7.2.tar.xz'
guix offload: error: failed to connect to 'localhost': Timeout connecting to
localhost
cannot build derivation
`/gnu/store/l6r93asndd0kwv7024iyrl71zd0lbpbq-icedove-102.7.2.drv': 1
dependencies couldn't be built
guix build: error: build of
`/gnu/store/l6r93asndd0kwv7024iyrl71zd0lbpbq-icedove-102.7.2.drv' failed
--8<---------------cut here---------------end--------------->8---
The third derivation tries to get a build slot and times out, because
the first two have already saturated the bandwidth of the link and it
takes more time than expected to get a reply.
The workaround is to use '-k', for "--keep-continuing", and retry the
3rd failing derivation after the first two completed.
I don't have a clear idea on how to improve the situation other than use
longer timeouts... but perhaps these timeouts could be dynamic based on
the load of the network/CPU/ ?
--
Thanks,
Maxim
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--- Begin Message ---
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Subject: |
Re: bug#61646: Bandwidth-induced offload timeout abort whole operating |
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Date: |
Fri, 24 Feb 2023 22:07:43 -0500 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
Hello,
Ludovic Courtès <ludo@gnu.org> writes:
[...]
> Weird. Since the it’s a timeout while connecting, I suppose the patch
> below would improve the situation:
>
> diff --git a/guix/scripts/offload.scm b/guix/scripts/offload.scm
> index 578b3b9888..90cf97401c 100644
> --- a/guix/scripts/offload.scm
> +++ b/guix/scripts/offload.scm
> @@ -220,7 +220,7 @@ (define* (open-ssh-session machine #:optional
> max-silent-time)
> (session (make-session #:user (build-machine-user machine)
> #:host (build-machine-name machine)
> #:port (build-machine-port machine)
> - #:timeout 10 ;initial timeout (seconds)
> + #:timeout 30 ;initial timeout (seconds)
> ;; #:log-verbosity 'protocol
> #:identity (build-machine-private-key machine)
Nevermind my previous message, it was --sysconfdir that had not been
set, thus ignoring my offload setup (/etc/guix/machines.scm). The
command worked to test the change from the local machine:
--8<---------------cut here---------------start------------->8---
sudo -E ./pre-inst-env ./guix-daemon --build-users-group guixbuild \
--max-silent-time 0 --timeout 0 --log-compression none --discover=yes \
--substitute-urls "https://ci.guix.gnu.org https://bordeaux.guix.gnu.org"; \
--max-jobs=4
--8<---------------cut here---------------end--------------->8---
I pushed the fix in commit 53d718f61b.
Closing, thank you!
--
Thanks,
Maxim
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