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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: pgsql-hackers@postgresql.org, Thomas Munro <thomas.munro@gmail.com>
Subject: Re: failures in t/031_recovery_conflict.pl on CI
Date: Tue, 03 May 2022 14:23:23 -0400
Message-ID: <2174975.1651602203@sss.pgh.pa.us> (raw)
In-Reply-To: <20220503182025.wvbebs2ojk6vpi5f@alap3.anarazel.de>
References: <5111.1649547266@sss.pgh.pa.us>
	<20220412184913.3wrt4olkdiqvicsj@alap3.anarazel.de>
	<907760.1649790322@sss.pgh.pa.us>
	<20220413002626.udl7lll7f3o7nre7@alap3.anarazel.de>
	<20220429200809.uuuseakmhb57sppk@alap3.anarazel.de>
	<465685.1651274819@sss.pgh.pa.us>
	<20220503014803.uknu3cwahwhbgrak@alap3.anarazel.de>
	<1929823.1651549472@sss.pgh.pa.us>
	<20220503040557.eimbfibv4rsey3s5@alap3.anarazel.de>
	<1959496.1651555006@sss.pgh.pa.us>
	<20220503182025.wvbebs2ojk6vpi5f@alap3.anarazel.de>

Andres Freund <andres@anarazel.de> writes:
> On 2022-05-03 01:16:46 -0400, Tom Lane wrote:
>> Irritatingly, it doesn't reproduce (at least not easily) in a manual
>> build on the same box.

> Odd, given how readily it seem to reproduce on the bf. I assume you built with
>> Uses -fsanitize=alignment -DWRITE_READ_PARSE_PLAN_TREES -DSTRESS_SORT_INT_MIN -DENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS

Yeah, I copied all that stuff ...

>> So it's almost surely a timing issue, and your theory here seems plausible.

> Unfortunately I don't think my theory holds, because I actually had added a
> defense against this into the test that I forgot about momentarily...

Oh, hm.  I can try harder to repro it.

			regards, tom lane





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