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Re: incomplete startup packet messages in logs

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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@xxxxxxxxxxxxx> 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




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