On Fri, Jan 10, 2025 at 2:22 PM Simon Avery <[email protected]>
wrote:

> Hello Again,
>
> Just wanted to say thank you again for this.
>
> I restored a copy of the replica from the day before, but after some
> expected HA_ERR_FOUND_DUPP_KEY errors, it started throwing a bunch of
> HA_ERR_KEY_NOT_FOUND and that didn’t work.
>
> Then I restored another copy from the same minute as the split, and after
> a few hundred HA_ERR_FOUND_DUPP_KEY skips, it started catching up. An hour
> later, it was 0 seconds behind and has stayed in sync.
>

Those errors shouldn't have happened. Are you sure you are running the
master with synv_binlog=1 and the slave with sync_master_info=1, and both
with innodb_flush_log_at_trx_commit=1 ?
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