Re: BUG #17684: pg_rewind ---could not receive data from WAL stream: ERROR: requested WAL segment 00000005000000000

At Fri, 11 Nov 2022 10:51:20 +0000, PG Bug reporting form <noreply(at)postgresql(dot)org> wrote in
> Master:192.168.247.110
> Standby:192.168.247.100
> Faiover On Standby:pg_ctl promote
>
> On the host 192.168.247.110 :
> pg_ctl stop -$PGDATA
> pg_rewind --target-pgdata=$PGDATA --source-server='host=192.168.247.100
> port=5432 user=postgres password=pass dbname=postgres' -R
> pg_ctl start -D $PGDATA
>
> but ,the pg instance not started
> error log:could not receive data from WAL stream: ERROR: requested WAL
> segment 000000050000000000000029 has already been removed

This report does not have enough information, but it seems like
related to [1]. Namely, pg_rewind removes WAL files in the target that
the source server does not have in pg_wal directory even though some
of the files are required at the first startup. That behavior is not a
bug itself (designed behavior) but could be annoying in some use
cases.

If I'm right, [1] would resolve your trouble. For the mement, using
primary's archive at the first startup of the standby would be a work
around.

[1] https://www.postgresql.org/message-id/CAAtGL4CM7hA0G4dS-Z_RckMy%2Bpzz_KGV2b%3D8ivDPTgaU4nySGg%40mail.gmail.com

regards.

--
Kyotaro Horiguchi
NTT Open Source Software Center