Re: Corner-case bug in pg_rewind

On 03/12/2020 16:10, Heikki Linnakangas wrote:
> On 02/12/2020 15:26, Ian Barwick wrote:
>> On 02/12/2020 20:13, Heikki Linnakangas wrote:
>>> Attached are two patches. The first patch is your original patch, unmodified
>>> (except for a cosmetic rename of the test file). The second patch builds on
>>> that, demonstrating and fixing the issue I mentioned. It took me a while to
>>> create a repro for it, it's easily masked by incidental full-page writes or
>>> because rows created by XIDs that are not marked as committed on the other
>>> timeline are invisible, but succeeded at last.
>>
>> Aha, many thanks. I wasn't entirely sure what I was looking for there and
>> recently haven't had the time or energy to dig any further.
> 
> Ok, pushed and backpatched this now.

The buildfarm is reporting sporadic failures in the new regression test. 
I suspect it's because of timing issues, where a server is promoted or 
shut down before some data has been replicated. I'll fix that tomorrow 
morning.

- Heikki