Re: logical replication launcher crash on buildfarm

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Petr Jelinek <petr(dot)jelinek(at)2ndquadrant(dot)com>
Cc: Andres Freund <andres(at)anarazel(dot)de>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Petr Jelinek <petr(at)2ndquadrant(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net>
Subject: Re: logical replication launcher crash on buildfarm
Date: 2017-04-01 01:30:17
Message-ID: CA+TgmobGk3DEo++oqkFi8AaYXhCs-0DUNMU9HdCh56udXFF=PA@mail.gmail.com
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On Fri, Mar 31, 2017 at 9:26 PM, Petr Jelinek
<petr(dot)jelinek(at)2ndquadrant(dot)com> wrote:
>> Hmm, I don't know if there's any good reason not to just use strcmp(),
>> but sure, OK. Committed and back-patched.
>
> Hmm culicidae still fails, this time only in parallel worker code. This
> didn't happen on my machine which is strange. Looking at the code, we
> are passing the fps->entrypoint as function pointer again so of course
> it fails. We have some code to load libraries again but even that gets
> initial entrypoint passed as function pointer
> (ParallelExtensionTrampoline). I wonder if we'll have to generalize the
> InternalBGWorkers even more to some kind of internal function name to
> pointer map and add the parallel entry points there as well.

Argh, I forgot about that. I think we need to use something like
ParallelExtensionTrampoline all the time, not just for libraries.
Since effectively, we've determined that postgres itself has the same
problem.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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