Re: [BUG]"FailedAssertion" reported in lazy_scan_heap() when running logical replication

On Thu, May 6, 2021 at 6:11 PM Masahiko Sawada <sawada.mshk@gmail.com> wrote:
> Since we set all_visible_according_to_vm before acquiring the buffer
> lock it's likely to happen that the page gets modified and all-visible
> bit is cleared after setting true to all_visible_according_to_vm. This
> assertion can easily be reproduced by adding a delay before the buffer
> lock and invoking autovacuums frequently:
>

Your analysis seems correct to me that before we acquire the page the
someone can modify it.  So this assertion is not correct.

-- 
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com