Re: incomplete startup packet messages in logs

ok i enabled log_connections

2018-11-01 13:44:18 UTC LOG: connection received: host=::1 port=47574
2018-11-01 13:44:18 UTC LOG: incomplete startup packet

i see this in my /etc/hosts

::1 localhost ip6-localhost ip6-loopback

and

host all all ::1/128 md5

in my hba,conf

i'll check why there is an attempt to make a connection.

Regards,
Vijay
On Thu, Nov 1, 2018 at 6:57 PM Vijaykumar Jain <vjain(at)opentable(dot)com> wrote:
>
> Hi Team,
>
> I know this is has been answered a lot on the internet wrt ignoring,
> but i am unable to figure out why I get these messages in logs
> "incomplete startup packet"
>
> I have a server running postgresql 10.5 on ubuntu16.04
>
> i do not have any active external connections other than streaming
> postgres replication.
>
>
> postgres 7757 1 0 12:20 ? 00:00:00
> /usr/lib/postgresql/10/bin/postgres -D /var/lib/postgresql/10/main -c
> config_file=/etc/postgresql/10/main/postgresql.conf
>
> postgres 7759 7757 0 12:20 ? 00:00:00 postgres: 10/main:
> checkpointer process
>
> postgres 7760 7757 0 12:20 ? 00:00:00 postgres: 10/main:
> writer process
>
> postgres 7761 7757 0 12:20 ? 00:00:00 postgres: 10/main: wal
> writer process
>
> postgres 7762 7757 0 12:20 ? 00:00:00 postgres: 10/main:
> autovacuum launcher process
>
> postgres 7763 7757 0 12:20 ? 00:00:00 postgres: 10/main:
> archiver process
>
> postgres 7764 7757 0 12:20 ? 00:00:00 postgres: 10/main:
> stats collector process
>
> postgres 7765 7757 0 12:20 ? 00:00:00 postgres: 10/main:
> bgworker: logical replication launcher
>
> postgres 7779 7757 0 12:20 ? 00:00:00 postgres: 10/main: wal
> sender process replicator x.x.x.x(47792) streaming 3/FA0001B0
>
> postgres 7780 7757 0 12:20 ? 00:00:00 postgres: 10/main: wal
> sender process replicator x.x.x.x(50526) streaming 3/FA0001B0
>
> postgres 7786 7757 0 12:21 ? 00:00:00 postgres: 10/main: wal
> sender process barman_streaming x.x.x.x(43566) streaming 3/FA0001B0
>
>
>
> also,
>
> postgres=# select backend_type, query from pg_stat_activity;
>
> backend_type | query
>
> ---------------------+---------------------------------------------------
>
> autovacuum launcher |
>
> background worker |
>
> walsender |
>
> walsender |
>
> walsender |
>
> client backend | select backend_type, query from pg_stat_activity;
>
> background writer |
>
> checkpointer |
>
> walwriter |
>
>
>
> but i still see
>
>
> tail -1000 /var/log/postgresql/postgresql-10-main.log| grep
> 'incomplete startup packet'
>
> 2018-11-01 13:04:18 UTC LOG: incomplete startup packet
>
> 2018-11-01 13:08:18 UTC LOG: incomplete startup packet
>
> 2018-11-01 13:12:18 UTC LOG: incomplete startup packet
>
>
> Note: exactly at 4 min interval.
>
> i do not know C, but i tried to understand something from
> https://github.com/postgres/postgres/blob/197e4af9d5da180190a0f2be851b095dba57d9cd/src/backend/postmaster/postmaster.c#L1891
>
> without any active connections, i would rule any driver issue out.
>
> i do not have ssl enabled, but not using it. I tried disabling it too.
>
> postgres=# show ssl;
>
> ssl
>
> -----
>
> off
>
> (1 row)
>
>
>
> I do not know, why those log messages are then showing up.
>
> not errors in
>
> ens160 Link encap:Ethernet HWaddr 00:50:56:a4:53:b6
>
> inet addr:x.x.x.x Bcast:x.x.x.x Mask:x.x.x.x
>
> inet6 addr: xxxxx/64 Scope:Link
>
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>
> RX packets:45403371 errors:0 dropped:0 overruns:0 frame:0
>
> TX packets:8834699 errors:0 dropped:0 overruns:0 carrier:0
>
> collisions:0 txqueuelen:1000
>
> RX bytes:6417380742 (6.4 GB) TX bytes:56209193635 (56.2 GB)
>
>
> lo Link encap:Local Loopback
>
> inet addr:127.0.0.1 Mask:255.0.0.0
>
> inet6 addr: ::1/128 Scope:Host
>
> UP LOOPBACK RUNNING MTU:65536 Metric:1
>
> RX packets:28985185 errors:0 dropped:0 overruns:0 frame:0
>
> TX packets:28985185 errors:0 dropped:0 overruns:0 carrier:0
>
> collisions:0 txqueuelen:1
>
> RX bytes:7078785550 (7.0 GB) TX bytes:7078785550 (7.0 GB)
>
>
>
>
>
>
>
> Regards,
> Vijay