Re: FDW Foreign Table Access: strange LOG message

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Albrecht Dreß <albrecht(dot)dress(at)arcor(dot)de>
Cc: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>, pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Re: FDW Foreign Table Access: strange LOG message
Date: 2018-03-22 22:55:12
Message-ID: 4004.1521759312@sss.pgh.pa.us
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Albrecht =?iso-8859-1?b?RHJl3w==?= <albrecht(dot)dress(at)arcor(dot)de> writes:
> No messages are printed whilst the session is open. However, when I quit the session by typing “\q” /after/ entering the command above, the LOG message appears. It does not appear when I query tables from my_db exclusively, though, i.e. when I do not access the Foreign Table.

It finally occurred to me what is a likely explanation for why you're
seeing these messages but I don't when I test postgres_fdw locally:
probably, you are encrypting connections to the foreign server with SSL.
I can reproduce "could not receive data from client: Connection reset by
peer" if I kill -9 a psql client when it's using SSL, but not otherwise.

Anyway, it's clearly not very nice that postgres_fdw makes no attempt
to do a graceful shutdown of its remote connection. I don't know that
this rises to the level of a bug, exactly, but if somebody wanted to
send in a patch it'd probably get accepted.

regards, tom lane

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