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R: R: BUG #6342: libpq blocks forever in "poll" function

From: "Andrea Grassi" <andreagrassi(at)sogeasoft(dot)com>
To: "'Craig Ringer'" <ringerc(at)ringerc(dot)id(dot)au>,"Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: <pgsql-bugs(at)postgresql(dot)org>
Subject: R: R: BUG #6342: libpq blocks forever in "poll" function
Date: 2011-12-20 09:01:55
Message-ID: 000601ccbef6$060820d0$12186270$@com (view raw, whole thread or download thread mbox)
Lists: pgsql-bugs
Sorry if I insist, but now I have the case at hand (my test program is now blocked), so I can check and verify all what you want.
I would like to know if it can be a libpq bug or if you think the fault is due to a system bug or to a machine issue and in this case I would be grateful if you could give me a hint on what could be.

Regards, Andrea

-----Messaggio originale-----
Da: Craig Ringer [mailto:ringerc(at)ringerc(dot)id(dot)au] 
Inviato: sabato 17 dicembre 2011 7.19
A: Andrea Grassi
Cc: pgsql-bugs(at)postgresql(dot)org
Oggetto: Re: R: [BUGS] BUG #6342: libpq blocks forever in "poll" function

On 16/12/2011 10:10 PM, Andrea Grassi wrote:
> The client program and the postgres server are on the same host, client connects to
> In the meantime, my original program blocks (not my example but very probably the reasons are the same).
> I typed "ps -C testprogramname -o wchan:80=" and the output was only a single dash ( "-" ).
That means it's not waiting in a kernel call right now. Was the program 
in the hung state you've observed at the time you ran the command? Its 
output would only be interesting when it's hung.
> I searched for the complete stack in /proc/$pid/stack (where $pid) was the pid of my process but this file doesn't exists !! Why ?
Old kernel, maybe? You're running on some kind of enterprise-y distro, 
so who knows how ancient half the stuff in there is.

Craig Ringer

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