Re: Race condition in InvalidateObsoleteReplicationSlots()

On Wed, Jun 23, 2021 at 7:32 PM Álvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
>
> 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.

I saw that this patch is pushed. If there is no pending work left for
this, can we change the commitfest entry to Committed.

Regards,
Vignesh