MDEV-38471 - funcs_1.processlist_val_no_prot fails sporadically

[svoj]

Test output was affected by incompletely closed preceding connections.

Wait for connections to leave I_S.PROCESSLIST before issuing SHOW PROCESSLIST.

Also fixes similar failures in funcs_1.processlist_val_ps.

[vuvova]

how could a stale connection cause this diff?

[svoj]

@vuvova Not sure I understand your question. As described in MDEV-12175 and MDEV-11223, SHOW PROCESSLIST and SELECT ... FROM I_S.PROCESSLIST emit extra row. Which comes from stale mtr-check connection.

Or did you mean this query?

SELECT COUNT(*) = 2 AS "Is HOST LIKE 'localhost%'?"
FROM INFORMATION_SCHEMA.PROCESSLIST
WHERE HOST LIKE 'localhost%';

Same answer though: COUNT(*) is going to be 3.

[svoj]

It appears that I messed up mdevs again. I will sort it out. Sorry. :)