Thanks much, I'll keep my eyes open today night hoping it will not happen
again.

On Thu, Jul 19, 2018 at 5:39 PM, Tom Lane <t...@sss.pgh.pa.us> wrote:

> [ please keep the list cc'd for the archives' sake ]
>
> Alessandro Aste <alessandro.a...@gmail.com> writes:
> > Hello Tom, thanks for your reply:
> >  SELECT * FROM pg_class  WHERE OID = 2223152859 ;
> > (0 rows)
> > I'm not aware of any DDL at that time.
>
> Hm.  Well, that OID was definitely there when pg_dump looked, and
> it's not there now, so something changed --- though we can't prove
> it changed concurrently.
>
> In any case, I'd bet that if we ran this to ground it would prove to be a
> concurrent-DDL issue.  pg_dump tries to protect itself against concurrent
> DDL, but for assorted architectural reasons the protection is not 100%;
> sometimes you can get odd failures like this, essentially due to "clock
> skew" between pg_dump's view of the catalogs and the server's view of the
> catalogs.  As long as it works on retry, I wouldn't worry too much about
> it.
>
>                         regards, tom lane
>

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