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From: Alexander Korotkov <[email protected]>
To: Andres Freund <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: Xuneng Zhou <[email protected]>
Cc: Álvaro Herrera <[email protected]>
Cc: Chao Li <[email protected]>
Cc: pgsql-hackers <[email protected]>
Cc: Michael Paquier <[email protected]>
Cc: jian he <[email protected]>
Cc: Tomas Vondra <[email protected]>
Cc: Yura Sokolov <[email protected]>
Subject: Re: Implement waiting for wal lsn replay: reloaded
Date: Wed, 7 Jan 2026 10:06:23 +0200
Message-ID: <CAPpHfdtw3_6JtR4S5E1J6RUirqZaJJRr1f63AKNKAjvVJMzffA@mail.gmail.com> (raw)
In-Reply-To: <iuzfab2lr54iarbt5ijxtkdbrkv5qnioykluu7pg53hn7gv2te@hz2bkg4aw7bi>
References: <CABPTF7Xs-64GQNjmbimZNhj2YSKbBny+evz6=cp3X2fkJS+vMQ@mail.gmail.com>
	<[email protected]>
	<CAPpHfduDVNo4VXgnQFZUg9=2yHQJfUUqjokbi3qVxuJiKNfcwg@mail.gmail.com>
	<CABPTF7UkwQZGx5ub731Q+=+rU8yx4ruqMdDt__L_dm9_32LsMw@mail.gmail.com>
	<CAPpHfds-KiZRuCruc0jHxLSxLqzKcHJGwOFFA0b_RgaJvtUOEQ@mail.gmail.com>
	<CABPTF7Vy4A0S0W7=B-fVd9Bo_15XG_FRYfKUF2CB_i=5svwEZQ@mail.gmail.com>
	<CA+hUKG+L0OQR8dQtsNBSaA3FNNyQeFabdeRVzurm0b7Xtp592g@mail.gmail.com>
	<iuzfab2lr54iarbt5ijxtkdbrkv5qnioykluu7pg53hn7gv2te@hz2bkg4aw7bi>

On Wed, Jan 7, 2026, 02:32 Andres Freund <[email protected]> wrote:

> Hi,
>
> On 2026-01-06 18:42:59 +1300, Thomas Munro wrote:
> > Could this be causing the recent flapping failures on CI/macOS in
> > recovery/031_recovery_conflict?  I didn't have time to dig personally
> > but f30848cb looks relevant:
> >
> > Waiting for replication conn standby's replay_lsn to pass 0/03467F58 on
> primary
> > error running SQL: 'psql:<stdin>:1: ERROR:  canceling statement due to
> > conflict with recovery
> > DETAIL:  User was or might have been using tablespace that must be
> dropped.'
> > while running 'psql --no-psqlrc --no-align --tuples-only --quiet
> > --dbname port=25195
> > host=/var/folders/g9/7rkt8rt1241bwwhd3_s8ndp40000gn/T/LqcCJnsueI
> > dbname='postgres' --file - --variable ON_ERROR_STOP=1' with sql 'WAIT
> > FOR LSN '0/03467F58' WITH (MODE 'standby_replay', timeout '180s',
> > no_throw);' at
> /Users/admin/pgsql/src/test/perl/PostgreSQL/Test/Cluster.pm
> > line 2300.
> >
> > https://cirrus-ci.com/task/5771274900733952
> >
> > The master branch in time-descending order, macOS tasks only:
> >
> >      task_id      | substring |  status
> > ------------------+-----------+-----------
> >  6460882231754752 | c970bdc0  | FAILED
> >  5771274900733952 | 6ca8506e  | FAILED
> >  6217757068361728 | 63ed3bc7  | FAILED
> >  5980650261446656 | ae283736  | FAILED
> >  6585898394976256 | 5f13999a  | COMPLETED
> >  4527474786172928 | 7f9acc9b  | COMPLETED
> >  4826100842364928 | e8d4e94a  | COMPLETED
> >  4540563027918848 | b9ee5f2d  | FAILED
> >  6358528648019968 | c5af141c  | FAILED
> >  5998005284765696 | e212a0f8  | COMPLETED
> >  6488580526178304 | b85d5dc0  | FAILED
> >  5034091344560128 | 7dc95cc3  | ABORTED
> >  5688692477526016 | bb048e31  | COMPLETED
> >  5481187977723904 | d351063e  | COMPLETED
> >  5101831568752640 | f30848cb  | COMPLETED <-- the change
> >  6395317408497664 | 3f33b63d  | COMPLETED
> >  6741325208354816 | 877ae5db  | COMPLETED
> >  4594007789010944 | de746e0d  | COMPLETED
> >  6497208998035456 | 461b8cc9  | COMPLETED
>
> The failure rates of this are very high - the majority of the CI runs on
> the
> postgres/postgres repos failed since the change went in. Which then also
> means
> cfbot has a very high spurious failure rate. I think we need to revert this
> change until the problem has been verified as fixed.
>

This is fair. I will revert the commit causing the failures in the next few
hours.

------
Regards,
Alexander Korotkov

>


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  Subject: Re: Implement waiting for wal lsn replay: reloaded
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