Re: MSVC SSL test failure

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Alexander Lakhin <exclusion(at)gmail(dot)com>, Lars Kanis <lars(at)greiz-reinsdorf(dot)de>
Subject: Re: MSVC SSL test failure
Date: 2021-12-06 06:02:51
Message-ID: 2998440.1638770571@sss.pgh.pa.us
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Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> On 12/5/21 12:50, Tom Lane wrote:
>> This looks quite a bit like the sort of failure that commit
>> 6051857fc was meant to forestall. I wonder whether reverting
>> that commit changes the results? You might also try inserting
>> a shutdown() call, as we'd decided not to do [1].

> Commenting out the closesocket() worked.

Man, that's annoying. Apparently OpenSSL is doing something to
screw up the shutdown sequence. According to [1], the graceful
shutdown sequence will happen by default, but changing SO_LINGER
or SO_DONTLINGER can get you into abortive shutdown anyway.
Maybe they change one of those settings (why?)

regards, tom lane

[1] https://docs.microsoft.com/en-us/windows/win32/winsock/graceful-shutdown-linger-options-and-socket-closure-2

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