| From: | Jelte Fennema-Nio <postgres(at)jeltef(dot)nl> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
| Cc: | Denis Laxalde <denis(dot)laxalde(at)dalibo(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Greg Stark <stark(at)mit(dot)edu>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Gregory Stark (as CFM)" <stark(dot)cfm(at)gmail(dot)com>, Jelte Fennema <Jelte(dot)Fennema(at)microsoft(dot)com>, Daniel Gustafsson <daniel(at)yesql(dot)se>, Peter Eisentraut <peter(at)eisentraut(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: [EXTERNAL] Re: Add non-blocking version of PQcancel |
| Date: | 2024-03-12 22:43:03 |
| Message-ID: | CAGECzQSmXBwHeTSHxVMtTo8JAexq0z8_rpUuAkHwMm2VbRvseg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, 12 Mar 2024 at 19:28, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
>
> On 2024-Mar-12, Alvaro Herrera wrote:
>
> > Hmm, buildfarm member kestrel (which uses
> > -fsanitize=undefined,alignment) failed:
> >
> > # Running: libpq_pipeline -r 700 cancel port=49975 host=/tmp/dFh46H7YGc
> > dbname='postgres'
> > test cancellations...
> > libpq_pipeline:260: query did not fail when it was expected
>
> Hm, I tried using the same compile flags, couldn't reproduce.
Okay, it passed now it seems so I guess this test is flaky somehow.
The error message and the timing difference between failed and
succeeded buildfarm run clearly indicates that the pg_sleep ran its
180 seconds to completion (so cancel was never processed for some
reason).
**failed case**
282/285 postgresql:libpq_pipeline / libpq_pipeline/001_libpq_pipeline
ERROR 191.56s exit status 1
**succeeded case**
252/285 postgresql:libpq_pipeline / libpq_pipeline/001_libpq_pipeline
OK 10.01s 21 subtests passed
I don't see any obvious reason for how this test can be flaky, but
I'll think a bit more about it tomorrow.
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