Re: ReplicationSlotRelease() crashes when the instance is in the single user mode

From: Michael Paquier <michael(at)paquier(dot)xyz>
To: "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>
Cc: 'Paul A Jungwirth' <pj(at)illuminatedcomputing(dot)com>, Mutaamba Maasha <maasha(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Bertrand Drouvot <bertranddrouvot(dot)pg(at)gmail(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: ReplicationSlotRelease() crashes when the instance is in the single user mode
Date: 2025-08-19 11:17:49
Message-ID: aKRdXV8o56mUl_gm@paquier.xyz
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On Tue, Aug 19, 2025 at 10:26:22AM +0000, Hayato Kuroda (Fujitsu) wrote:
> I added a first version of the test. It could work on my env (Linux).

You could also validate that using the CI, assuming that you have a
cloned repo on github with the CI enabled. See src/tools/ci/README.
I use that a lot with local branches for pre-commit validations where
things could break across the board.

> Since I cannot come up the appropriate place, I introduced new test file in
> recovery test. creating/dropping/advancing a slot, and doing a logical decoding
> is tested. Since standby mode is not supported by the single-user instance,
> I did not test the slot synchronization. I have not known that.

Hmm. src/test/modules/test_misc/ makes more sense to me here. (No
need to send an updated patch just for that.)

> IIUC, 0001 can be backpatched for all supported branches. I will create for them
> after patch would be a good shape.

Thanks, I'll check all that tomorrow.
--
Michael

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