Re: A failure in 031_recovery_conflict.pl on Debian/s390x

Thomas Munro <thomas.munro@gmail.com>

From: Thomas Munro <thomas.munro@gmail.com>

To: Andres Freund <andres@anarazel.de>

Cc: Christoph Berg <myon@debian.org>, Noah Misch <noah@leadboat.com>, Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Melanie Plageman <melanieplageman@gmail.com>

Date: 2023-09-07T02:41:08Z

Lists: pgsql-hackers

Commits

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Fix instability in 031_recovery_conflict.pl.
- 0174c2d213f6 17.0 landed
Fix recovery conflict SIGUSR1 handling.
- 0da096d78e1e 17.0 landed
Disable 031_recovery_conflict.pl in 15 and 16.
- e13de4913913 15.5 landed
- 8d1cf9674a25 16.0 landed

On Sun, Aug 13, 2023 at 9:00 AM Andres Freund <andres@anarazel.de> wrote:
> On 2023-08-12 15:50:24 +1200, Thomas Munro wrote:
> > Thanks.  I realised that it's easy enough to test that theory about
> > cleanup locks by hacking ConditionalLockBufferForCleanup() to return
> > false randomly.  Then the test occasionally fails as described.  Seems
> > like we'll need to fix that test, but it's not evidence of a server
> > bug, and my signal handler refactoring patch is in the clear.  Thanks
> > for testing it!
>
> WRT fixing the test: I think just using VACUUM FREEZE ought to do the job?
> After changing all the VACUUMs to VACUUM FREEZEs, 031_recovery_conflict.pl
> passes even after I make ConditionalLockBufferForCleanup() fail 100%.

I pushed that change (master only for now, like the other change).