Re: BUG #15727: PANIC: cannot abort transaction 295144144, it was already committed

Hi,

On 2019-04-06 12:23:06 -0400, Tom Lane wrote:
> It seems that there may be some connection between this problem and
> EPQ. I was working on committing Amit's fix for bug #15677, which
> demonstrated that EPQ doesn't work for partitioned-table target rels.
> It seemed like there really needed to be regression test coverage for
> that, so I tried to convert his crasher example into an isolation test.
> It does indeed crash without Amit's fix ... but with it, lookee what
> I get:
>
> +error in steps c1 complexpartupdate: ERROR: unexpected table_lock_tuple status: 1
>
> That seems fully reproducible in this test. I haven't looked into
> exactly what's causing that, but now that we have a reproducible
> example, somebody should.
>
> I'm not quite sure if I should commit this as-is or wait till the
> other problem is fixed. A crash is probably worse than a bogus
> error, but I don't like committing obviously-wrong "expected" output.
> Thoughts?

Let me have a look at the testcase - I'd been running Roman's testcase
for quite a few hours without being able to reproduce. But your testcase
seems to trigger this reliably, so I hope I can make some quick
progress.

- Andres