Re: Intermittent failure in InstallCheck-C "stat" test

Thomas Munro <thomas(dot)munro(at)gmail(dot)com> writes:
> On Sat, Apr 6, 2019 at 11:19 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> This sort of thing has pretty much always happened. I believe it is
>> just down to the designed-in unreliability of the current stats collection
>> mechanism. We might be able to get rid of it if we go over to
>> shared-memory stats, but I've yet to look at that patch :-(. In the
>> meantime I don't see any reason to think that anything's worse here
>> than it has been for many years.

> Does it imply that the kernel dropped a UDP packet to localhost?

That's a possible explanation, anyway. The problem shows up seldom enough
that it's hard to say that conclusively. So *maybe* there's a bug here
we could actually fix, but again, without any way to repro it, it's hard
to say much.

regards, tom lane