Re: Unexpected Standby Shutdown on sync_replication_slots change

On Tue, 2025-07-29 at 13:40 +0900, Fujii Masao wrote:
> I think it's basically not acceptable for a server to start up
> successfully before a minor version update, but then fail to start with
> the same configuration after the update. If that's absolutely necessary
> to fix a bug, it might be justifiable. But in this case, I don't think
> it's required.
>
> Blocking startup when sync_replication_slots is enabled and wal_level
> is not logical could be helpful. But that feels more like an improvement
> than a bug fix. I'm fine adding that to master, but I don't think we should
> apply it to old branches.
>
> That said, both Shveta and Amit support backpatching this change,
> so I'd like to hear more opinions before we decide.

I side with you on that one.

I think it would be fine to backpatch the breaking change to v18,
if we mention the behavior change in the release notes.

Yours,
Laurenz Albe