Re: [HACKERS] Timing-sensitive case in src/test/recovery TAP tests

On 26 June 2017 at 11:06, Michael Paquier  wrote:

> As long as we are on it, there is this code block in the test:
> my ($xmin, $catalog_xmin) = get_slot_xmins($node_master, $slotname_1);
> is($xmin,         '', 'non-cascaded slot xmin null with no hs_feedback');
> is($catalog_xmin, '', 'non-cascaded slot xmin null with no hs_feedback');
>
> ($xmin, $catalog_xmin) = get_slot_xmins($node_standby_1, $slotname_2);
> is($xmin,         '', 'cascaded slot xmin null with no hs_feedback');
> is($catalog_xmin, '', 'cascaded slot xmin null with no hs_feedback');
>
> This should be more verbose as the 2nd and 4th test should say
> "catalog xmin" instead of xmin.

Agree, should. Mind posting a revision?

> Also, wouldn't it be better to poll as well node_standby_1's
> pg_replication_slot on slotname_2? It would really seem better to make
> the nullness check conditional in get_slot_xmins instead. Sorry for
> changing opinion here.

I'm not sure I understand this.

-- Craig Ringer                   http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services