Hi Stuart McGraw,

How about your "log_line_prefix
<https://www.postgresql.org/docs/10/static/runtime-config-logging.html#GUC-LOG-LINE-PREFIX>"
?

On Tue, May 22, 2018 at 7:48 AM, Stuart McGraw <smcg4...@mtneva.com> wrote:

> When I start my postgresql server I get 11 messages reporting that
> "password
> authentication failed for user 'postgres'" spaced about ~.5sec apart.
> I increased the logging level to INFO, and added the application name to
> the
> message format (after the pid) which resulted in:
>
>   2018-05-21 23:04:44.395 MDT [20232][[unknown]] [unknown]@[unknown] LOG:
> connection received: host=[local]
>   2018-05-21 23:04:44.395 MDT [20232][[unknown]] postgres@postgres
> FATAL:  password authentication failed for user "postgres"
>   2018-05-21 23:04:44.395 MDT [20232][[unknown]] postgres@postgres
> DETAIL:  Password does not match for user "postgres".
>         Connection matched pg_hba.conf line 90: "local   all   all   md5"
>
> This is on a Ububuntu-18.04 machine with postgresql-10.3 from Ubuntu.  As
> distributed
> the pg_hba.conf line mentioned used "peer" authentication method, I have
> changed to
> "md5".  When I change back to "peer" the error messages go away.  The
> processes are
> too short-lived for me to catch with ps.  Successful connect message
> example:
>
>   2018-05-21 23:25:13.577 MDT [21080][[unknown]] [unknown]@[unknown] LOG:
> connection received: host=[local]
>   2018-05-21 23:25:13.578 MDT [21080][[unknown]] postgres@postgres LOG:
> connection authorized: user=postgres database=postgres
>   2018-05-21 23:25:13.579 MDT [21080][psql] postgres@postgres LOG:
> disconnection: session time: 0:00:00.002 user=postgres database=postgres
> host=[local]
>
> My question is, how can I find out where the connections are coming from
> so I can
> modify them to provide passwords (so I can go back to "md5")?  Are there
> startup-
> time connections made by postgresql itself or is this likely from some
> Ubuntu-
> specific configuration?
>
> Thanks.
>
>

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