GNU bug report logs - #67041
[cuirass] cuirass-web crash

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Package: guix; Reported by: Maxim Cournoyer <maxim.cournoyer@HIDDEN>; merged with #64276; dated Fri, 10 Nov 2023 14:01:02 UTC; Maintainer for guix is bug-guix@HIDDEN.
Merged 64276 67041. Request was from Ludovic Courtès <ludo@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
Subject: Re: bug#67041: [cuirass] cuirass-web crash
In-Reply-To: <874jhlu1bm.fsf@HIDDEN> ("Ludovic =?utf-8?Q?Court=C3=A8s=22'?=
 =?utf-8?Q?s?= message of "Thu, 16 Nov 2023 17:09:49 +0100")
References: <87ttptemk7.fsf@HIDDEN> <874jhlu1bm.fsf@HIDDEN>
Date: Thu, 16 Nov 2023 23:26:48 +0100
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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:

> scheme@(guile-user)> (run-fibers
> (lambda ()
>   (define pool (make-resource-pool (iota 10)))
>   (with-resource-from-pool pool x (pk 'x x) (throw 'doh!))))
>
> ;;; (x 0)
> Uncaught exception in task:
> In fibers.scm:
>    186:20  9 (_)
>    145:21  8 (_)
> In ice-9/boot-9.scm:
>   1752:10  7 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
> In cuirass/utils.scm:
>     99:24  6 (_)
> In current input:
>      6:44  5 (_ _)
> In ice-9/boot-9.scm:
>   1685:16  4 (raise-exception _ #:continuable? _)
> In cuirass/utils.scm:
>     96:12  3 (_ #<&compound-exception components: (#<&error> #<&irritants=
 irritants: ()> #<&exception-with-kind-and-args kind: doh! args: ()>)>)
> In fibers/operations.scm:
>    154:10  2 (perform-operation _)
> In fibers/scheduler.scm:
>     357:6  1 (suspend-current-task _)
> In ice-9/boot-9.scm:
>   1685:16  0 (raise-exception _ #:continuable? _)
> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
> Attempt to suspend fiber within continuation barrier

This is fixed by Cuirass commit
7c697ad7f15c13264615d2b6c9165b21abaf61dd.

Ludo=E2=80=99.




Information forwarded to bug-guix@HIDDEN:
bug#67041; Package guix. Full text available.

Message received at 67041 <at> debbugs.gnu.org:


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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
Subject: Re: bug#67041: [cuirass] cuirass-web crash
In-Reply-To: <87ttptemk7.fsf@HIDDEN> (Maxim Cournoyer's message of "Fri, 10
 Nov 2023 08:59:36 -0500")
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Date: Thu, 16 Nov 2023 17:09:49 +0100
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Hi,

Maxim Cournoyer <maxim.cournoyer@HIDDEN> skribis:

> 2023-11-10 13:11:30 ice-9/boot-9.scm:1685:16: In procedure raise-exceptio=
n:
> 2023-11-10 13:11:30 In procedure accept: Too many open files

Apparently there=E2=80=99s something that causes =E2=80=98cuirass web=E2=80=
=99 to leak file
descriptors, the number being otherwise stable around 50:

--8<---------------cut here---------------start------------->8---
2023-11-08 06:53:23 heap: 61.34 MiB; threads: 9; file descriptors: 50
2023-11-08 07:03:23 heap: 61.34 MiB; threads: 9; file descriptors: 50
2023-11-08 07:13:23 heap: 61.34 MiB; threads: 9; file descriptors: 50
2023-11-08 07:23:23 heap: 61.34 MiB; threads: 9; file descriptors: 50
2023-11-08 07:33:23 heap: 54.97 MiB; threads: 9; file descriptors: 50
2023-11-08 07:43:23 heap: 54.97 MiB; threads: 9; file descriptors: 50
2023-11-08 07:53:23 heap: 54.97 MiB; threads: 9; file descriptors: 50
2023-11-08 08:03:23 heap: 54.97 MiB; threads: 9; file descriptors: 50
2023-11-08 08:13:23 heap: 61.34 MiB; threads: 9; file descriptors: 50
2023-11-08 08:23:23 heap: 61.34 MiB; threads: 9; file descriptors: 50
2023-11-08 08:33:23 heap: 61.34 MiB; threads: 9; file descriptors: 50
2023-11-08 08:43:23 heap: 61.34 MiB; threads: 9; file descriptors: 50
2023-11-08 08:53:23 heap: 61.34 MiB; threads: 9; file descriptors: 50
2023-11-08 09:03:23 heap: 61.34 MiB; threads: 9; file descriptors: 51
2023-11-08 09:13:23 heap: 61.34 MiB; threads: 9; file descriptors: 154
2023-11-08 09:23:23 heap: 61.34 MiB; threads: 9; file descriptors: 232
2023-11-08 09:33:23 heap: 61.34 MiB; threads: 9; file descriptors: 282
2023-11-08 09:43:23 heap: 61.34 MiB; threads: 9; file descriptors: 385
2023-11-08 09:53:23 heap: 61.34 MiB; threads: 9; file descriptors: 489
2023-11-08 10:03:23 heap: 61.34 MiB; threads: 9; file descriptors: 608
2023-11-08 10:13:23 heap: 61.34 MiB; threads: 9; file descriptors: 665
2023-11-08 10:23:23 heap: 61.34 MiB; threads: 9; file descriptors: 706
2023-11-08 10:33:23 heap: 61.34 MiB; threads: 9; file descriptors: 760
2023-11-08 10:43:23 heap: 61.34 MiB; threads: 9; file descriptors: 802
2023-11-08 10:53:23 heap: 61.34 MiB; threads: 9; file descriptors: 865
2023-11-08 11:03:23 heap: 61.34 MiB; threads: 9; file descriptors: 969
2023-11-08 11:13:24 heap: 61.34 MiB; threads: 9; file descriptors: 0
2023-11-08 11:23:24 heap: 61.34 MiB; threads: 9; file descriptors: 0
--8<---------------cut here---------------end--------------->8---

Looking at the logs, the FD leak may come from this:

--8<---------------cut here---------------start------------->8---
2023-11-08 09:03:35 GET /eval/903503
2023-11-08 09:03:35 In cuirass/http.scm:
2023-11-08 09:03:35   1074:25 11 (url-handler _ _ _)
2023-11-08 09:03:35     295:4 10 (evaluation-html-page #<<evaluation-summar=
y> id: 90350?> ?)
2023-11-08 09:03:35 In cuirass/logging.scm:
2023-11-08 09:03:35    111:18  9 (call-with-time-logging "builds request fo=
r evaluation?" ?)
2023-11-08 09:03:35 In ice-9/boot-9.scm:
2023-11-08 09:03:35   1752:10  8 (with-exception-handler _ _ #:unwind? _ # =
_)
2023-11-08 09:03:35 In cuirass/utils.scm:
2023-11-08 09:03:35     99:24  7 (_)
2023-11-08 09:03:35 In cuirass/database.scm:
2023-11-08 09:03:35    1503:2  6 (_ _)
2023-11-08 09:03:35   1439:28  5 (proc _)
2023-11-08 09:03:35 In ice-9/boot-9.scm:
2023-11-08 09:03:35   1685:16  4 (raise-exception _ #:continuable? _)
2023-11-08 09:03:35 In cuirass/utils.scm:
2023-11-08 09:03:35     96:12  3 (_ #<&compound-exception components: (#<&e=
rror> #<&orig?>)
2023-11-08 09:03:35 In fibers/operations.scm:
2023-11-08 09:03:35    154:10  2 (perform-operation _)
2023-11-08 09:03:35 In fibers/scheduler.scm:
2023-11-08 09:03:35     357:6  1 (suspend-current-task _)
2023-11-08 09:03:35 In ice-9/boot-9.scm:
2023-11-08 09:03:35   1685:16  0 (raise-exception _ #:continuable? _)
2023-11-08 09:03:35 Attempt to suspend fiber within continuation barrier
--8<---------------cut here---------------end--------------->8---

Fortunately, this is easy to reproduce:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guile
GNU Guile 3.0.9
Copyright (C) 1995-2023 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)> ,use(fibers)
scheme@(guile-user)> ,use(cuirass utils)
scheme@(guile-user)> (run-fibers
(lambda ()
  (define pool (make-resource-pool (iota 10)))
  (with-resource-from-pool pool x (pk 'x x) (throw 'doh!))))

;;; (x 0)
Uncaught exception in task:
In fibers.scm:
   186:20  9 (_)
   145:21  8 (_)
In ice-9/boot-9.scm:
  1752:10  7 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
In cuirass/utils.scm:
    99:24  6 (_)
In current input:
     6:44  5 (_ _)
In ice-9/boot-9.scm:
  1685:16  4 (raise-exception _ #:continuable? _)
In cuirass/utils.scm:
    96:12  3 (_ #<&compound-exception components: (#<&error> #<&irritants i=
rritants: ()> #<&exception-with-kind-and-args kind: doh! args: ()>)>)
In fibers/operations.scm:
   154:10  2 (perform-operation _)
In fibers/scheduler.scm:
    357:6  1 (suspend-current-task _)
In ice-9/boot-9.scm:
  1685:16  0 (raise-exception _ #:continuable? _)
ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Attempt to suspend fiber within continuation barrier
--8<---------------cut here---------------end--------------->8---

To be continued=E2=80=A6

Ludo=E2=80=99.




Information forwarded to bug-guix@HIDDEN:
bug#67041; Package guix. Full text available.

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From: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
To: bug-guix <bug-guix@HIDDEN>
Subject: [cuirass] cuirass-web crash
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Hi,

Today ci.guix.gnu.org was showing a 504 Gateway Time-out error.  Looking
at /var/log/cuirass-web.log on berlin, there's this backtrace:

--8<---------------cut here---------------start------------->8---
2023-11-10 13:11:30 Uncaught exception in task:
2023-11-10 13:11:30 GET /build/18305/details
2023-11-10 13:11:30 In fibers.scm:
2023-11-10 13:11:30     172:8  4 (_)
2023-11-10 13:11:30 In web/server/fiberized.scm:
2023-11-10 13:11:30    187:12  3 (socket-loop #<input-output: socket 44> #<<channel> get?>)
2023-11-10 13:11:30 In ice-9/suspendable-ports.scm:
2023-11-10 13:11:30    733:12  2 (_ #<input-output: socket 44> _)
2023-11-10 13:11:30 In unknown file:
2023-11-10 13:11:30            1 (accept #<input-output: socket 44> 526336)
2023-11-10 13:11:30 In ice-9/boot-9.scm:
2023-11-10 13:11:30   1685:16  0 (raise-exception _ #:continuable? _)
2023-11-10 13:11:30 ice-9/boot-9.scm:1685:16: In procedure raise-exception:
2023-11-10 13:11:30 In procedure accept: Too many open files
--8<---------------cut here---------------end--------------->8---

Restarting it with 'sudo herd restart cuirass-web' resolved that for
now.

-- 
Thanks,
Maxim




Acknowledgement sent to Maxim Cournoyer <maxim.cournoyer@HIDDEN>:
New bug report received and forwarded. Copy sent to guix-sysadmin@HIDDEN, bug-guix@HIDDEN. Full text available.
Report forwarded to guix-sysadmin@HIDDEN, bug-guix@HIDDEN:
bug#67041; Package guix. Full text available.
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