Re: subscription/015_stream sometimes breaks

On Thu, Aug 24, 2023 at 1:20 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
>
> On 2023-Aug-24, Amit Kapila wrote:
>
> > On Wed, Aug 23, 2023 at 1:31 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
>
> > > Hmm, I think if worker->in_use is false, we shouldn't consult the rest
> > > of the struct at all, so I propose to add the attached 0001 as a minimal
> > > fix.
> >
> > I think that way we may need to add the check for in_use before
> > accessing each of the LogicalRepWorker struct fields or form some rule
> > about which fields (or places) are okay to access without checking
> > in_use field.
>
> As far as I realize, we have that rule already.  It's only a few
> relatively new places that have broken it.  I understand that the in_use
> concept comes from the one of the same name in ReplicationSlot, except
> that it is not at all documented in worker_internal.h.
>
> So I propose we do both: apply Zhijie's patch and my 0001 now; and
> somebody gets to document the locking design for LogicalRepWorker.
>

Agreed.

-- 
With Regards,
Amit Kapila.