Re: Race conditions with WAL sender PID lookups

On Fri, May 19, 2017 at 3:01 PM, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
> Also, as Horiguchi-san pointed out earlier, walreceiver seems need the
> similar fix.

Actually, now that I look at it, ready_to_display should as well be
protected by the lock of the WAL receiver, so it is incorrectly placed
in walreceiver.h. As you are pointing out, pg_stat_get_wal_receiver()
is lazy as well, and that's new in 10, so we have an open item here
for both of them. And I am the author for both things. No issues
spotted in walreceiverfuncs.c after review.

I am adding an open item so as both issues are fixed in PG10. With the
WAL sender part, I think that this should be a group shot.

So what do you think about the attached?
--
Michael