| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>, Peter Geoghegan <pg(at)bowt(dot)ie> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Concurrency bug in amcheck |
| Date: | 2020-04-22 15:57:00 |
| Message-ID: | 20200422155700.vvpdks2fzucwcsd3@alap3.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
Hi,
Peter, Just thought you might want to see this one...
On 2020-04-21 15:31:13 +0300, Alexander Korotkov wrote:
> On Tue, Apr 21, 2020 at 12:54 PM Alexander Korotkov
> <a(dot)korotkov(at)postgrespro(dot)ru> wrote:
> > I found concurrency bug in amcheck running on replica. When
> > btree_xlog_unlink_page() replays changes to replica, deleted page is
> > left with no items. But if amcheck steps on such deleted page
> > palloc_btree_page() expects it would have items.
>
> I forgot to mention that I've reproduced it on master. Quick check
> shows bug should exist since 11.
- Andres
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