On 2021-Jun-20, Tom Lane wrote:
> Actually ... isn't there a second race, in the opposite direction?
> IIUC, the point of this is that once we force some WAL to be sent
> to the frozen sender/receiver, they'll be killed for failure to
> respond. But the advance_wal call is not the only possible cause
> of that; a background autovacuum for example could emit some WAL.
> So I fear it's possible for the 'to release replication slot'
> message to come out before we capture $logstart. I think you
> need to capture that value before the kill not after.
I accounted for all those things and pushed again.
--
Álvaro Herrera Valdivia, Chile
"I can see support will not be a problem. 10 out of 10." (Simon Wittber)
(http://archives.postgresql.org/pgsql-general/2004-12/msg00159.php)
