Re: Duplicate key existant/index visibility bug in 9.3.3

On Jan 26, 2015, at 2:43 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> Peter Geoghegan <pg(at)heroku(dot)com> writes:
>> On Mon, Jan 26, 2015 at 2:19 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>> You should definitely also update to 9.3.5 (or next week, 9.3.6) ASAP.
>>> Even if this specific problem isn't fixed, there's a bunch of things
>>> that *are* fixed and will eventually bite you. 9.3.X has not been
>>> one of our most stable release branches :-(
>
>> I didn't consider the bug report in detail, but I think it's likely
>> that this was in fact the bug fixed by
>> 6bfa88acd3df830a5f7e8677c13512b1b50ae813.
>
> Maybe. That would require at least one crash recovery to have happened on
> the server, which Erik seemed to be claiming had not happened. But
> if there were any crashes then it would possibly fit.

Definitely nothing recent crash/recovery-wise but digging further back in the logs it looks like there was a crash recovery run startup back on 2014-09-30, which was about a week after this server was created. I suppose it’s possible that the index has been corrupt since then but only now showing something visible?