Re: t/035_standby_logical_decoding.pl might fail on attempt to read wrong timeline

Bertrand Drouvot <bertranddrouvot.pg@gmail.com>

From: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>

To: Xuneng Zhou <xunengzhou@gmail.com>

Cc: "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>, Alexander Lakhin <exclusion@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>

Date: 2026-06-10T17:28:00Z

Lists: pgsql-hackers

Hi,

On Wed, Jun 10, 2026 at 04:36:14PM +0800, Xuneng Zhou wrote:
> On Tue, Jun 9, 2026 at 7:01 PM Bertrand Drouvot
> > 0002 does that by starting the new walsender and doing the decoding while the
> > startup is paused
> > 0004 does that by ensuring the pre-connected session triggers the decoding while
> > the startup is paused
> 
> The
> essential thing is just to ensure that the startup remains paused
> until decoding output is observed.

Right, thanks for confirming. That's exactly what v2 is doing.

Regards,

-- 
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com

Commits

Fix second race with timeline selection during promotion
- d9b49e5b4fc2 16 (unreleased) landed
- ab5334d8bfa2 17 (unreleased) landed
- 4bff3aa51c19 18 (unreleased) landed
- a8ee70bd5e00 19 (unreleased) landed
Remove TAP test for timeline lookup race with logical decoding on standbys
- c011d5b65457 17 (unreleased) landed
Fix race with timeline selection in logical decoding during promotion
- 8cd687c44b62 16 (unreleased) landed
- 16b89ff04839 17 (unreleased) landed
- b4bd1385043c 18 (unreleased) landed
- eb4e7224a1c6 19 (unreleased) landed
Backport GetWALInsertionTimeLineIfSet()
- 2a04624daa32 16 (unreleased) landed
TAP test for logical decoding on standby
- fcd77d53217b 16.0 cited