| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Eric Thinnes <e(dot)thinnes(at)gmx(dot)de> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Segmentation fault when calling BlessTupleDesc in a C function in parallel on PostgreSQL-(12.6, 12.7, 13.2, 13.3) |
| Date: | 2021-05-29 03:51:51 |
| Message-ID: | CA+hUKG+Jadj0GaqaaZeqjpx-kiPiDKVsBLEnf06E=Ns8HKyLvg@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Mon, May 17, 2021 at 7:01 PM Eric Thinnes <e(dot)thinnes(at)gmx(dot)de> wrote:
> > PG 11, before that there was a different arrangement involving
> > translation), but there is a low probability edge case that your test
> > manages to hit fairly reliably, where two backends try to bless a
>
> I see that I have a talent for stepping into the trap.
>
> > record_table_entry->key.u.shared_tupdesc);
> > Assert(result->tdrefcount == -1);
> >
> > With that change I can see it still hits this path often but works
> > correctly. Will fix next week.
>
> That is good news.
>
> This means that all users can benefit from it.
Pushed. Thanks for the report and the reproducer!
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