Re: Sometimes the output to the stdout in Windows disappears

On 10/16/20 12:18 PM, Tom Lane wrote:
>
> But wait a minute: I just looked at Microsoft's docs [1] and found
>
> In a multithreaded environment, WSACleanup terminates Windows Sockets
> operations for all threads.
>
> This makes me (a) wonder if that explains the side-effects on stdio,
> and (b) question why libpq is calling WSACleanup at all.
> What if we arranged to call WSAStartup just once, during the first
> libpq connection-open in a process, and then never did WSACleanup?
> Surely the OS can cope with that, and it eliminates any risk that
> WSACleanup breaks something.
>
> regards, tom lane
>
> [1] https://docs.microsoft.com/en-us/windows/win32/api/winsock/nf-winsock-wsacleanup
>
>

This could explain random transient stdout/stderr failures we have seen
over the years. I think we should at least give your suggestion a try -
this is a good time in the dev cycle for such experiments.

cheers

andrew