Re: Crashes on a partition whose concurrent detach never finished

From: shveta malik <shveta(dot)malik(at)gmail(dot)com>
To: Zsolt Parragi <zsolt(dot)parragi(at)percona(dot)com>
Cc: Nisha Moond <nisha(dot)moond412(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, Mihail Nikalayeu <mihailnikalayeu(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, vignesh C <vignesh21(at)gmail(dot)com>, "ashutosh(dot)bapat(dot)oss(at)gmail(dot)com" <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, shveta malik <shveta(dot)malik(at)gmail(dot)com>
Subject: Re: Crashes on a partition whose concurrent detach never finished
Date: 2026-09-23 08:51:17
Message-ID: CAJpy0uAzTDwmq1F_N0XgADpp9TFFqEvvscWbH17Ym5LHeSP7sQ@mail.gmail.com
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On Tue, Sep 22, 2026 at 2:31 AM Zsolt Parragi <zsolt(dot)parragi(at)percona(dot)com> wrote:
>
> Hello!
>
> An automated claude review found a residual crash in pgoutput after
> the committed fix, which repeatedly crashes the walsender following an
> interrupted ALTER TABLE ... DETACH PARTITION ... CONCURRENTLY.
>
> 0001 contains a test case and a simple fix.

Thanks for the patches. 001 is a known issue as Nisha pointed out.

> And after further looking, I realized that there's one more leftover
> issue, which doesn't cause a crash but failures in subscribers:
> pg_get_publication_tables only relied on relispartition instead of
> following the same approach as the previous fix commit and 0001. 0002
> modifies it to match the other locations.

I earlier pointed the issue in pg_get_publication_tables's
is_table_publishable_in_publication() in [1] (see pt b), which your
002 has addressed. I agree with the problem and the fix for the HEAD.
I can reveiw in detail once we plan to address all such issues on
HEAD.

[1]:https://www.postgresql.org/message-id/CAJpy0uB-EpnNPUEFzLT38JX84swWFnsRbhPKCpnzSbnb1UNSmQ%40mail.gmail.com

thanks
Shveta

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