Re: BUG #19623: Postmaster livelocks respawning io workers when children die after crash restart; pg_ctl stop fails

From: Michael Paquier <michael(at)paquier(dot)xyz>
To: Zexin Li <lizi(dot)openmind(at)gmail(dot)com>
Cc: pgsql-bugs(at)lists(dot)postgresql(dot)org, m0935388420(at)gmail(dot)com, ayushtiwari(dot)slg01(at)gmail(dot)com
Subject: Re: BUG #19623: Postmaster livelocks respawning io workers when children die after crash restart; pg_ctl stop fails
Date: 2026-08-20 01:44:11
Message-ID: aoZb624sa9KRsRG4@paquier.xyz
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On Thu, Aug 20, 2026 at 10:28:53AM +0900, Zexin Li wrote:
> Thanks for the report. I think this side note, rather than the io
> worker respawn, is the actual bug. I reproduced the silent respawn
> loop on Linux master with a hack that makes every child die in
> InitPostmasterChild(), and it is unchanged with io_method=sync:

Would you mind sharing that, as a matter of reproducibility?

> Adding Michael and Ayush in CC, as committer and author of
> 9b43e6793b0f.

Thanks for the poke, I'll look into that.
--
Michael

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