Re: processes stuck in shutdown following OOM/recovery

On Sat, Dec 2, 2023 at 2:18 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> On Fri, Dec 1, 2023 at 6:13 PM Justin Pryzby <pryzby@telsasoft.com> wrote:
> > $ kill -9 2524495; sleep 0.05; pg_ctl -D ./pgdev.dat1 stop -m fast # 2524495 is a child's pid
>
> > This affects v15, and fails at ) but not its parent.
>
> Repro'd here.  I had to make the sleep shorter on my system.  Looking...

The PostmasterStateMachine() case for PM_WAIT_BACKENDS doesn't tell
the checkpointer to shut down in this race case.  We have
CheckpointerPID != 0 (because 7ff23c6d27 starts it earlier than
before), and FatalError is true because a child recently crashed and
we haven't yet received the PMSIGNAL_RECOVERY_STARTED handler that
would clear it.  Hmm.