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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Josef Machytka <josef.machytka@gmail.com>
Cc: pgsql-bugs@postgresql.org
Subject: Re: BUG #14471: PostgreSQL 9.6 "NOT IN" in select causes crash with "ERROR: unknown error"
Date: Fri, 23 Dec 2016 10:49:44 -0500
Message-ID: <27432.1482508184@sss.pgh.pa.us> (raw)
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Josef Machytka <josef.machytka@gmail.com> writes:
> So I checked all logs and it turned out one of databases involved vent into
> recovery mode because some of its connections was killed.
> Probably out of memory killer did it. So it caused chain reaction. And
> billing query was canceled "due to administration command" and it was shown
> through dblink as "unknown error".

OK.  In that case I'm betting that what dblink saw was a network error on
its next attempt to send a command.  I've not dug into the code to verify
this positively, but I think the behavior will be improved by Joe Conway's
recent patch,
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=2f802d95b4904dbed3dfdca1b3a607cd0...

			regards, tom lane


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