Re: BUG #19432: recovery fails at invalid checkpoint record

On Thu, 2026-03-12 at 16:20 +0000, PG Bug reporting form wrote:
> Hi, I'm trying to restore from a pg_basebackup at timeline 1 to a
> restore_target_time in timeline 2.
> It fails at "invalid checkpoint record", "could not locate required
> checkpoint record at 0/3000080".
> All relevant wal files are in the archive, the restore_command works and
> backup_label, pg_controldata, pg_waldump and 00000002.history look like
> everything should work.
> Recovering only timeline 1 works, but it fails as soon as it should proceed
> in timeline 2.
> A 6.7MB tar of the basebackup and the wal archive is available at
> https://get.hidrive.com/i/PwMejRQG . This link expires on 2026-03-13, I can
> provide a new link if needed.
> Why does this recovery fail?

Funny.  I unpacked your data directory and reduced your postgresql.auto.conf
to something that fits my system:

log_min_messages = 'DEBUG5'
restore_command = 'cp /home/laurenz/hamme/fakearchive/%f %p'
recovery_target_time = '2026-03-11 14:51:28 UTC'
recovery_target_action = 'promote'
hot_standby_feedback = 'on'
log_destination = 'csvlog'
log_directory = '/home/laurenz/hamme/log'
logging_collector = 'on'
wal_level = 'logical'
port = 5433
unix_socket_directories = '/home/laurenz/hamme'
max_connections = 300

Recovery worked like a charm.  pg_waldump shows the checkpoint record in
000000010000000000000003 at the correct position.

Not sure what you did wrong.

Yours,
Laurenz Albe