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

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ludovic Courtès <ludovic.courtes <at> inria.fr>
Subject: bug#64276: closed (Re: bug#67041: [cuirass] cuirass-web crash)
Date: Thu, 23 Nov 2023 11:44:02 +0000

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Your bug report

#67041: [Cuirass] Continuation barrier while serving HTTP requests

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 64276 <at> debbugs.gnu.org.

-- 
67041: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=67041
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: guix-sysadmin <guix-sysadmin <at> gnu.org>, 67041-done <at> debbugs.gnu.org
Subject: Re: bug#67041: [cuirass] cuirass-web crash
Date: Thu, 23 Nov 2023 12:43:45 +0100

Ludovic Courtès <ludo <at> gnu.org> skribis:

> This is fixed by Cuirass commit
> 7c697ad7f15c13264615d2b6c9165b21abaf61dd.

Included in the ‘cuirass’ package update in Guix commit
300e9ad43d1f7a10013aa0724ed3aeb7d93500c1, now deployed on berlin and its
x86 build nodes.

Ludo'.

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From: Ludovic Courtès <ludovic.courtes <at> inria.fr>
To: bug-guix <at> gnu.org
Subject: [Cuirass] Continuation barrier while serving HTTP requests
Date: Sat, 24 Jun 2023 22:59:00 +0200

I noticed this backtrace:

--8<---------------cut here---------------start------------->8---
2023-06-21 18:28:27 GET /eval/6436191
2023-06-21 18:28:27 In cuirass/http.scm:
2023-06-21 18:28:27    978:25 11 (url-handler _ _)
2023-06-21 18:28:27    202:16 10 (evaluation-html-page ((#:id . 6436191) (# . 0) (. #) ?) ?)
2023-06-21 18:28:27 In cuirass/logging.scm:
2023-06-21 18:28:27    110:18  9 (call-with-time-logging "builds request" #<procedure 7f?>)
2023-06-21 18:28:27 In ice-9/boot-9.scm:
2023-06-21 18:28:27   1752:10  8 (with-exception-handler _ _ #:unwind? _ # _)
2023-06-21 18:28:27 In cuirass/utils.scm:
2023-06-21 18:28:27    124:24  7 (_)
2023-06-21 18:28:27 In cuirass/database.scm:
2023-06-21 18:28:27    1305:2  6 (_ _)
2023-06-21 18:28:27   1245:28  5 (proc _)
2023-06-21 18:28:27 In ice-9/boot-9.scm:
2023-06-21 18:28:27   1685:16  4 (raise-exception _ #:continuable? _)
2023-06-21 18:28:27 In cuirass/utils.scm:
2023-06-21 18:28:27    121:12  3 (_ #<&compound-exception components: (#<&error> #<&orig?>)
2023-06-21 18:28:27 In fibers/operations.scm:
2023-06-21 18:28:27    155:10  2 (perform-operation _)
2023-06-21 18:28:27 In fibers/scheduler.scm:
2023-06-21 18:28:27     386:6  1 (suspend-current-task _)
2023-06-21 18:28:27 In ice-9/boot-9.scm:
2023-06-21 18:28:27   1685:16  0 (raise-exception _ #:continuable? _)
2023-06-21 18:28:27 Attempt to suspend fiber within continuation barrier
--8<---------------cut here---------------end--------------->8---

Apparently the starting point is ‘db-get-builds’ throwing an exception,
and later on ‘call-with-resource-from-pool’ being unable to suspend as
it calls ‘put-message’ to return the resource to the pool.

This is with Cuirass commit c74d60d194b4036f5f649ce8b6481b51d8061d89
(the resource pool was introduced earlier, in commit
425ede115e05c5b9864e1c443ade8019fa659c67).

Ludo’.

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