[Kea-users] Duplicate logging

[Darren Ankney]

Hi,

It won't be possible to help you with this without at least the
loggers section of your configuration.  It also looks like you may
have changed the logging pattern and did not include this part:
"[%c/%i.%t]" which would have shown which logger was producing the
log, the process id (to rule out the possibility of multiple Kea
servers running), and finally the thread id (which would have been the
final piece proving that it was the same log duplicated).
Additionally, these values are often helpful when you are trying to
trace what happened with a particular packet as they can move to
different threads when parked during certain hook callouts and the
like.  It is often helpful to organize the logs by thread id when
looking deeply at some behavior.

Please attach a copy of your "loggers" configuration to progress
troubleshooting.

Thank you,
Darren Ankney

On Fri, Aug 7, 2026 at 4:10 PM Jim <jim at wrightthisway.com> wrote:
>
> I don’t check my logs often but was making an update to my config and something odd caught my eye, I’m getting a number of lines duplicated.  My config hasn’t changed for months until today, and this started happening back in July 28, it looks like Kea reloaded itself and that’s when the dupes began.
>
> I checked the logs and all I see is Version 3.0.3 listed both before and after that, so I don’t think the actual software release changed, yum shows my version as 3.0.3-1.el10_2.
>
> Sample log lines that are dupes:
>
> 2026-08-07 16:01:09.625 INFO  DHCP4_QUERY_LABEL received query: [hwtype=1 0c:29:ef:e2:05:80], cid=[no info], tid=0xd14ec51b
>
> 2026-08-07 16:01:09.625 INFO  DHCP4_QUERY_LABEL received query: [hwtype=1 0c:29:ef:e2:05:80], cid=[no info], tid=0xd14ec51b
>
> 2026-08-07 16:01:09.625 INFO  DHCP4_PACKET_RECEIVED [hwtype=1 0c:29:ef:e2:05:80], cid=[no info], tid=0xd14ec51b: DHCPDISCOVER (type 1) received from 100.67.122.254 to 100.67.10.20 on interface eno16895np0
>
> 2026-08-07 16:01:09.625 INFO  DHCP4_PACKET_RECEIVED [hwtype=1 0c:29:ef:e2:05:80], cid=[no info], tid=0xd14ec51b: DHCPDISCOVER (type 1) received from 100.67.122.254 to 100.67.10.20 on interface eno16895np0
>
> 2026-08-07 16:01:09.626 INFO  DHCP4_PACKET_SEND [hwtype=1 0c:29:ef:e2:05:80], cid=[no info], tid=0xd14ec51b: trying to send packet DHCPOFFER (type 2) from 100.67.10.20:67 to 100.67.122.254:67 on interface eno16895np0
>
> 2026-08-07 16:01:09.626 INFO  DHCP4_PACKET_SEND [hwtype=1 0c:29:ef:e2:05:80], cid=[no info], tid=0xd14ec51b: trying to send packet DHCPOFFER (type 2) from 100.67.10.20:67 to 100.67.122.254:67 on interface eno16895np0
>
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