Re: "ERROR: deadlock detected" when replicating TRUNCATE

On Mon, May 17, 2021 at 6:47 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Mon, May 17, 2021 at 12:30 PM Peter Smith <smithpb2250(at)gmail(dot)com> wrote:
> >
[...]
> > The essence of the trouble seems to be that the apply_handle_truncate
> > function never anticipated it may end up truncating the same table
> > from 2 separate workers (subscriptions) like this test case is doing.
> > Probably this is quite an old problem because the
> > apply_handle_truncate code has not changed much for a long time.
> >
>
> Yeah, have you checked it in the back branches?
>

Yes, the apply_handle_truncate function was introduced in April/2018 [1].

REL_11_0 was tagged in Oct/2018.

The "ERROR: deadlock detected" log is reproducible in PG 11.0.

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[1] https://github.com/postgres/postgres/commit/039eb6e92f20499ac36cc74f8a5cef7430b706f6

Kind Regards,
Peter Smith.
Fujitsu Australia.