From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
---|---|
To: | Julien Rouhaud <rjuju123(at)gmail(dot)com> |
Cc: | Michail Nikolaev <michail(dot)nikolaev(at)gmail(dot)com>, Pavel Borisov <pashkin(dot)elfe(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Stream replication test fails of cfbot/windows server 2019 |
Date: | 2022-01-12 23:40:00 |
Message-ID: | CA+hUKGKtf1eESpoRNX=H_o7fYf=+K4QEjgK6ZgdisAbXmgFMfw@mail.gmail.com |
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Lists: | pgsql-hackers |
On Thu, Jan 13, 2022 at 12:24 AM Julien Rouhaud <rjuju123(at)gmail(dot)com> wrote:
> On Wed, Jan 12, 2022 at 01:51:24PM +0300, Michail Nikolaev wrote:
> > https://cirrus-ci.com/task/6532060239101952
> > https://cirrus-ci.com/task/4755551606276096
For the record, cfbot only started running the recovery tests on
Windows a couple of weeks ago (when the new improved .cirrus.yml
landed in the tree). I don't know if it's significant that Pavel's
patch is failing every time:
https://cirrus-ci.com/github/postgresql-cfbot/postgresql/commitfest/36/3464
... while one mentioned by Michail has lower frequency random failures:
https://cirrus-ci.com/github/postgresql-cfbot/postgresql/commitfest/36/2979
> Indeed, and yet CI on postgres tree doesn't exhibit any problem:
> https://cirrus-ci.com/github/postgres/postgres
(It's very cool that we have that turned on now!) That has run ~35
times (once per commit) and never failed. Across all cfbot branches,
cfbot is triggering over 100 builds a day, so something like 1400
since we started running the recovery test on Windows, so it's not a
fair comparison: plenty more chances for random/timing based failures
to show up.
I don't know how many different kinds of flakiness we're suffering
from on Windows. Could these cases be explained by the FD_CLOSE
problem + timing differences?
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