Re: libpq compression

From: Daniil Zakhlystov <usernamedt(at)yandex-team(dot)ru>
To: Konstantin Knizhnik <k(dot)knizhnik(at)postgrespro(dot)ru>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>
Subject: Re: libpq compression
Date: 2020-11-03 15:08:55
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<div>Hi,<br /><br />Looks like I found an issue: there can be a situation when libpq frontend hangs after zpq_read(). This may happen when the socket is not read ready and we can't perform another read because we wait on pqWait() but we actually have some buffered rx data.<br /><br />I think we should add a check if there is any buffered rx data before calling pqWait() to avoid such hangs.<br /><br />--<br />Daniil Zakhlystov</div>

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