Re: pgsql: Implement pg_wal_replay_wait() stored procedure - Mailing list pgsql-committers

On Wed, 3 Apr 2024 at 09:42, Alexander Korotkov <aekorotkov@gmail.com> wrote:
> I'm trying to figure out if this failure could be related to this commit...
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=culicidae&dt=2024-04-02%2020%3A24%3A55

Yeah, I think it is.

The problem is that in WaitLSNSetLatches() waitLSN is NULL, so
SpinLockAcquire(&waitLSN->mutex); segfaults.  This shared memory
segment is initialized in WaitLSNShmemInit() called via
CreateSharedMemoryAndSemaphores().  If you look at main() in main.c
EXEC_BACKEND builds call SubPostmasterMain(), which has no call to
CreateSharedMemoryAndSemaphores(), so waitLSN isn't initialized.

David