Re: pgsql: Make postgres_fdw's query_cancel test less flaky.

Hi Tom,

On Fri, Aug 30, 2024 at 08:47:46PM +0000, Tom Lane wrote:
> Make postgres_fdw's query_cancel test less flaky.
>
> This test occasionally shows
>
> +WARNING:  could not get result of cancel request due to timeout
>
> which appears to be because the cancel request is sometimes unluckily
> sent to the remote session between queries, and then it's ignored.
>
> Back-patch to v17 where this test was introduced.

Based on this recent report from the buildfarm, there is still
something happening here:
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=drongo&dt=2025-03-07%2004%3A31%3A37

In details:
 -- This would take very long if not canceled:
 SELECT count(*) FROM ft1 a CROSS JOIN ft1 b CROSS JOIN ft1 c CROSS JOIN ft1 d;
 ERROR:  canceling statement due to statement timeout
+WARNING:  could not send cancel request: cancel request timed out
 COMMIT;
--
Michael