Re: A successful SELECT 1; on failed connection - Mailing list psycopg

From Marko Kreen
Subject Re: A successful SELECT 1; on failed connection
Date
Msg-id CACMqXCJ-ctCkbcaUuzUS2WDSvh9v_B1retk4qdSd=ZLs-FzeGA@mail.gmail.com
Whole thread Raw
In response to A successful SELECT 1; on failed connection  (Croepha <croepha@gmail.com>)
List psycopg
On Thu, Sep 29, 2011 at 10:34 PM, Croepha <croepha@gmail.com> wrote:
> I am developing a network appliance application that uses psycopg2 to
> connect to a database through an OpenVPN connection. The application has two
> modes that it switches between, an online mode and a disconnected mode.  It
> periodically tries to reconnect once it is in a disconnected mode.  It tests
> the connection by doing a connection.cursor().execute('SELECT 1;').   The
> application log reports coming online and then going back offline,
> but during this time the OpenVPN log reports being offline...
> There may be a bug in my application, but I thought I would ask and see if
> anyone else has seen anything like this?

You  would need both connect_timeout and tcp keepalive
for reconnect to be reliable.  But otherwise its probably app problem.

--
marko

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