| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Alexander Lakhin <exclusion(at)gmail(dot)com> |
| Cc: | PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: BUG #17116: Assert failed in SerialSetActiveSerXmin() on commit of parallelized serializable transaction |
| Date: | 2021-07-29 21:41:33 |
| Message-ID: | CA+hUKG+uRkCpVCfrUb0rTMyEBLhfpsDuW91d9XNT1d-cxEJenQ@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Wed, Jul 28, 2021 at 5:02 PM Thomas Munro <thomas(dot)munro(at)gmail(dot)com> wrote:
> On Wed, Jul 28, 2021 at 9:00 AM Alexander Lakhin <exclusion(at)gmail(dot)com> wrote:
> > (Except for read-only-anomaly-3, that causes another
> > assertion fail but I believe that it's not related to the initial issue
> > and deserves another bug report.)
>
> Huh. I tried and failed to find that one with concurrent runs. I'll
> wait for your next report before I do anything, just in case there's a
> connection.
This is indeed an unrelated issue, and much older. After many
kilowatt hours, I reproduced it here and worked out that it comes from
GetSafeSnapshot() not expecting possibleUnsafeConflicts to be empty
when WritableSxactCount == 0. More soon.
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