Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Thanks for the link, Darren. My lfc is set to 7200 seconds, and I can
consistently repro the issue, so unlikely to be hitting that condition. That
said, after I bumped the logs to debug I could see some better messages, which
seems related to memfile-lfc:
2025-10-14 06:04:41.596 INFO kea-dhcp6.dhcp6 DHCP6_CONFIG_COMPLETE DHCPv6
server has completed configuration: added IPv6 subnets: 4698; DDNS: disabled
2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv DHCPSRV_CLOSE_DB closing
currently open memfile database
2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv
DHCPSRV_TIMERMGR_UNREGISTER_TIMER unregistering timer: memfile-lfc
2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv
DHCPSRV_MEMFILE_LFC_UNREGISTER_TIMER_FAILED failed to unregister timer
'memfile-lfc': unable to unregister non existing timer 'memfile-lfc'
For reference, here’s what the lease section of my config looks like:
"lease-database": {
"type": "memfile",
"name": "/var/lib/kea/kea-dhcp6.csv",
"lfc-interval": 7200,
"persist": true
},
Thanks,
Diogo
Get Outlook for iOS<https://aka.ms/o0ukef>
From: Kea-users on behalf of Darren Ankney
Sent: Tuesday, October 14, 2025 2:01:36 AM
To: Kea user's list
Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Hi Diogo,
That backtrace doesn't look particularly useful because no symbols
were found. Kea's logs would probably be far more useful in this
case. it would have some message indicating why it is exiting. Here
is one example of a problem you could be encountering:
https://urldefense.com/v3/__https://gitlab.isc.org/isc-projects/kea/-/issues/3986__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IJJDBDxQ$<https://urldefense.com/v3/__https:/gitlab.isc.org/isc-projects/kea/-/issues/3986__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IJJDBDxQ$>
but without log
messages, it is just guessing.
Thank you,
Darren Ankney
On Mon, Oct 13, 2025 at 6:15 PM Diogo André de Assumpção via Kea-users
wrote:
>
> Hi All,
>
> I’ve been experiencing an issue with kea-dhcp6 (4 doesn’t seem affected)
> where when I issue a config-reload command directly to the dhcp6 socket, the
> server crashes.
>
>
>
> Looking at the backtrace it seems to be related to the lease management – I’m
> using memfile – and maybe some cleanup that is done as part of the reload?
>
>
>
> Has anyone experienced something similar?
>
>
>
> Note that the config file loads fine when starting the server.
>
>
>
> Here’s a backtrace and a few more things from the coredump if it helps:
> https://gist.github.com/DiogoAndre/aa8c144329424b431b755711d7a96606
>
>
>
> Thanks,
> – Diogo
>
>
>
> --
> ISC funds the development of this software with paid support subscriptions.
> Contact us at
> https://urldefense.com/v3/__https://www.isc.org/contact/__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IBEgZWtQ$<https://urldefense.com/v3/__https:/www.isc.org/contact/__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IBEgZWtQ$>
> for more information.
>
> To unsubscribe visit
> https://urldefense.com/v3/__https://lists.isc.org/mailman/listinfo/kea-users__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IK-1-3Nd$<https://urldefense.com/v3/__https:/lists.isc.org/mailman/listinfo/kea-users__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IK-1-3Nd$>
> .
> [email protected]
--
ISC funds the development of this software with paid support subscriptions.
Contact us at
https://urldefense.com/v3/__https://www.isc.org/contact/__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IBEgZWtQ$<https://urldefense.com/v3/__https:/www.isc.org/contact/__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IBEgZWtQ$>
for more information.
To unsubscribe visit
https://urldefense.com/v3/__https://lists.isc.org/mailman/listinfo/kea-users__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IK-1-3Nd$<https://urldefense.com/v3/__https:/lists.isc.org/mailman/listinfo/kea-users__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IK-1-3Nd$>
.
[email protected]
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Contact us at https://www.isc.org/contact/ for more information.
To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
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Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Can you provide the output of kea-dhcp4 -W?
I think the EPEL packages use the 'lto' flag which might cause this crash.
Regards,
Razvan
-Original Message-
From: Darren
To: Kea
Date: Wednesday, 15 October 2025 10:07 PM EEST
Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Hi Diogo,
I assume that Kea starts up OK after the crash without need to alter
the configuration file? I am not able to reproduce your crash with or
without client activity. Perhaps if you could share your
configuration file, that might help. Please feel free to anonymize
it, if it contains sensitive information.
Thank you,
Darren Ankney
On Tue, Oct 14, 2025 at 2:15 PM Diogo André de Assumpção via Kea-users
wrote:
>
> We’re using packages from EPEL, and upgraded to 2.6.3 maybe a month or so
> ago. I didn’t notice any issues before with 2.6.2 and there was a bit of a
> gap on using the config-reload after migrating to 2.6.3 and just now we’re
> noticing it.
>
> I’ve also tested on test server with same os, packages, etc., but without any
> active leases, and there’s no crash when reloading.
>
>
>
> Thanks,
> Diogo
>
>
>
> From: Razvan Becheriu
> Date: Tuesday, October 14, 2025 at 8:40 AM
> To: Kea user's list
> Cc: Kea user's list , Diogo André de Assumpção
>
> Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
>
> Hi, We need more information. Do you use pkgs or do you compile? Have you
> been using a different version before upgrading/installing? If using pkgs,
> are these official ISC kea packages? Thank you, Razvan From: Diogo
>
>
> Hi,
>
>
>
> We need more information.
>
>
>
> Do you use pkgs or do you compile?
>
> Have you been using a different version before upgrading/installing?
>
> If using pkgs, are these official ISC kea packages?
>
>
>
> Thank you,
>
> Razvan
>
>
>
> ________
>
> From: Diogo
> To: Kea
> Cc: Diogo
> Date: Tuesday, 14 October 2025 4:12 PM EEST
> Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
>
> Thanks for the link, Darren. My lfc is set to 7200 seconds, and I can
> consistently repro the issue, so unlikely to be hitting that condition. That
> said, after I bumped the logs to debug I could see some better messages,
> which seems related to memfile-lfc:
>
>
>
> 2025-10-14 06:04:41.596 INFO kea-dhcp6.dhcp6 DHCP6_CONFIG_COMPLETE DHCPv6
> server has completed configuration: added IPv6 subnets: 4698; DDNS: disabled
>
> 2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv DHCPSRV_CLOSE_DB closing
> currently open memfile database
>
> 2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv
> DHCPSRV_TIMERMGR_UNREGISTER_TIMER unregistering timer: memfile-lfc
>
> 2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv
> DHCPSRV_MEMFILE_LFC_UNREGISTER_TIMER_FAILED failed to unregister timer
> 'memfile-lfc': unable to unregister non existing timer 'memfile-lfc'
>
>
>
> For reference, here’s what the lease section of my config looks like:
>
>
>
> "lease-database": {
>
> "type": "memfile",
>
> "name": "/var/lib/kea/kea-dhcp6.csv",
>
> "lfc-interval": 7200,
>
> "persist": true
>
> },
>
>
>
>
>
> Thanks,
>
> Diogo
>
>
>
>
>
>
>
> Get Outlook for iOS
>
>
>
> From: Kea-users on behalf of Darren Ankney
>
> Sent: Tuesday, October 14, 2025 2:01:36 AM
> To: Kea user's list
> Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
>
>
>
>
>
> Hi Diogo,
>
> That backtrace doesn't look particularly useful because no symbols
> were found. Kea's logs would probably be far more useful in this
> case. it would have some message indicating why it is exiting. Here
> is one example of a problem you could be encountering:
> https://urldefense.com/v3/__https://gitlab.isc.org/isc-projects/kea/-/issues/3986__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IJJDBDxQ$
> but without log
> messages, it is just guessing.
>
> Thank you,
> Darren Ankney
>
> On Mon, Oct 13, 2025 at 6:15 PM Diogo André de Assumpção via Kea-users
> wrote:
> >
> > Hi All,
> >
> > I’ve been experiencing an issue with kea-dhcp6 (4 doesn’t seem affected)
> > where when I issue a config-reload command directly to the dhcp6 socket,
> > the server crashes.
> >
> >
> >
> > Looking at the backtrace it seems to be rel
Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Hi,
We need more information.
Do you use pkgs or do you compile? Have you been using a different version
before upgrading/installing? If using pkgs, are these official ISC kea
packages? Thank you, Razvan
-Original Message-
From: Diogo
To: Kea
Cc: Diogo
Date: Tuesday, 14 October 2025 4:12 PM EEST
Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Thanks for the link, Darren. My lfc is set to 7200 seconds, and I can
consistently repro the issue, so unlikely to be hitting that condition. That
said, after I bumped the logs to debug I could see some better messages, which
seems related to memfile-lfc: 2025-10-14 06:04:41.596 INFO kea-dhcp6.dhcp6
DHCP6_CONFIG_COMPLETE DHCPv6 server has completed configuration: added IPv6
subnets: 4698; DDNS: disabled 2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv
DHCPSRV_CLOSE_DB closing currently open memfile database 2025-10-14
06:04:42.221 DEBUG kea-dhcp6.dhcpsrv DHCPSRV_TIMERMGR_UNREGISTER_TIMER
unregistering timer: memfile-lfc 2025-10-14 06:04:42.221 DEBUG
kea-dhcp6.dhcpsrv DHCPSRV_MEMFILE_LFC_UNREGISTER_TIMER_FAILED failed to
unregister timer 'memfile-lfc': unable to unregister non existing timer
'memfile-lfc' For reference, here’s what the lease section of my config looks
like: "lease-database": { "type": "memfile",
"name": "/var/lib/kea/kea-dhcp6.csv", "lfc-interval": 7200,
"persist": true }, Thanks, Diogo
Get Outlook for iOS
From: Kea-users on behalf of Darren Ankney
Sent: Tuesday, October 14, 2025 2:01:36 AM
To: Kea user's list
Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Hi Diogo,
That backtrace doesn't look particularly useful because no symbols
were found. Kea's logs would probably be far more useful in this
case. it would have some message indicating why it is exiting. Here
is one example of a problem you could be encountering:
https://urldefense.com/v3/__https://gitlab.isc.org/isc-projects/kea/-/issues/3986__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IJJDBDxQ$
but without log
messages, it is just guessing.
Thank you,
Darren Ankney
On Mon, Oct 13, 2025 at 6:15 PM Diogo André de Assumpção via Kea-users
wrote:
>
> Hi All,
>
> I’ve been experiencing an issue with kea-dhcp6 (4 doesn’t seem affected)
> where when I issue a config-reload command directly to the dhcp6 socket, the
> server crashes.
>
>
>
> Looking at the backtrace it seems to be related to the lease management – I’m
> using memfile – and maybe some cleanup that is done as part of the reload?
>
>
>
> Has anyone experienced something similar?
>
>
>
> Note that the config file loads fine when starting the server.
>
>
>
> Here’s a backtrace and a few more things from the coredump if it helps:
> https://gist.github.com/DiogoAndre/aa8c144329424b431b755711d7a96606
>
>
>
> Thanks,
> – Diogo
>
>
>
> --
> ISC funds the development of this software with paid support subscriptions.
> Contact us at
> https://urldefense.com/v3/__https://www.isc.org/contact/__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IBEgZWtQ$
> for more information.
>
> To unsubscribe visit
> https://urldefense.com/v3/__https://lists.isc.org/mailman/listinfo/kea-users__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IK-1-3Nd$
> .
> [email protected]
--
ISC funds the development of this software with paid support subscriptions.
Contact us at
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for more information.
To unsubscribe visit
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.
[email protected]
--
ISC funds the development of this software with paid support subscriptions.
Contact us at https://www.isc.org/contact/ for more information.
To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
[email protected]
Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Hi Diogo, That backtrace doesn't look particularly useful because no symbols were found. Kea's logs would probably be far more useful in this case. it would have some message indicating why it is exiting. Here is one example of a problem you could be encountering: https://gitlab.isc.org/isc-projects/kea/-/issues/3986 but without log messages, it is just guessing. Thank you, Darren Ankney On Mon, Oct 13, 2025 at 6:15 PM Diogo André de Assumpção via Kea-users wrote: > > Hi All, > > I’ve been experiencing an issue with kea-dhcp6 (4 doesn’t seem affected) > where when I issue a config-reload command directly to the dhcp6 socket, the > server crashes. > > > > Looking at the backtrace it seems to be related to the lease management – I’m > using memfile – and maybe some cleanup that is done as part of the reload? > > > > Has anyone experienced something similar? > > > > Note that the config file loads fine when starting the server. > > > > Here’s a backtrace and a few more things from the coredump if it helps: > https://gist.github.com/DiogoAndre/aa8c144329424b431b755711d7a96606 > > > > Thanks, > – Diogo > > > > -- > ISC funds the development of this software with paid support subscriptions. > Contact us at https://www.isc.org/contact/ for more information. > > To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. > [email protected] -- ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. [email protected]
Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Hi Diogo,
I assume that Kea starts up OK after the crash without need to alter
the configuration file? I am not able to reproduce your crash with or
without client activity. Perhaps if you could share your
configuration file, that might help. Please feel free to anonymize
it, if it contains sensitive information.
Thank you,
Darren Ankney
On Tue, Oct 14, 2025 at 2:15 PM Diogo André de Assumpção via Kea-users
wrote:
>
> We’re using packages from EPEL, and upgraded to 2.6.3 maybe a month or so
> ago. I didn’t notice any issues before with 2.6.2 and there was a bit of a
> gap on using the config-reload after migrating to 2.6.3 and just now we’re
> noticing it.
>
> I’ve also tested on test server with same os, packages, etc., but without any
> active leases, and there’s no crash when reloading.
>
>
>
> Thanks,
> Diogo
>
>
>
> From: Razvan Becheriu
> Date: Tuesday, October 14, 2025 at 8:40 AM
> To: Kea user's list
> Cc: Kea user's list , Diogo André de Assumpção
>
> Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
>
> Hi, We need more information. Do you use pkgs or do you compile? Have you
> been using a different version before upgrading/installing? If using pkgs,
> are these official ISC kea packages? Thank you, Razvan From: Diogo
>
>
> Hi,
>
>
>
> We need more information.
>
>
>
> Do you use pkgs or do you compile?
>
> Have you been using a different version before upgrading/installing?
>
> If using pkgs, are these official ISC kea packages?
>
>
>
> Thank you,
>
> Razvan
>
>
>
> ________________
>
> From: Diogo
> To: Kea
> Cc: Diogo
> Date: Tuesday, 14 October 2025 4:12 PM EEST
> Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
>
> Thanks for the link, Darren. My lfc is set to 7200 seconds, and I can
> consistently repro the issue, so unlikely to be hitting that condition. That
> said, after I bumped the logs to debug I could see some better messages,
> which seems related to memfile-lfc:
>
>
>
> 2025-10-14 06:04:41.596 INFO kea-dhcp6.dhcp6 DHCP6_CONFIG_COMPLETE DHCPv6
> server has completed configuration: added IPv6 subnets: 4698; DDNS: disabled
>
> 2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv DHCPSRV_CLOSE_DB closing
> currently open memfile database
>
> 2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv
> DHCPSRV_TIMERMGR_UNREGISTER_TIMER unregistering timer: memfile-lfc
>
> 2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv
> DHCPSRV_MEMFILE_LFC_UNREGISTER_TIMER_FAILED failed to unregister timer
> 'memfile-lfc': unable to unregister non existing timer 'memfile-lfc'
>
>
>
> For reference, here’s what the lease section of my config looks like:
>
>
>
> "lease-database": {
>
> "type": "memfile",
>
> "name": "/var/lib/kea/kea-dhcp6.csv",
>
> "lfc-interval": 7200,
>
> "persist": true
>
> },
>
>
>
>
>
> Thanks,
>
> Diogo
>
>
>
>
>
>
>
> Get Outlook for iOS
>
>
>
> From: Kea-users on behalf of Darren Ankney
>
> Sent: Tuesday, October 14, 2025 2:01:36 AM
> To: Kea user's list
> Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
>
>
>
>
>
> Hi Diogo,
>
> That backtrace doesn't look particularly useful because no symbols
> were found. Kea's logs would probably be far more useful in this
> case. it would have some message indicating why it is exiting. Here
> is one example of a problem you could be encountering:
> https://urldefense.com/v3/__https://gitlab.isc.org/isc-projects/kea/-/issues/3986__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IJJDBDxQ$
> but without log
> messages, it is just guessing.
>
> Thank you,
> Darren Ankney
>
> On Mon, Oct 13, 2025 at 6:15 PM Diogo André de Assumpção via Kea-users
> wrote:
> >
> > Hi All,
> >
> > I’ve been experiencing an issue with kea-dhcp6 (4 doesn’t seem affected)
> > where when I issue a config-reload command directly to the dhcp6 socket,
> > the server crashes.
> >
> >
> >
> > Looking at the backtrace it seems to be related to the lease management –
> > I’m using memfile – and maybe some cleanup that is done as part of the
> > reload?
> >
> >
> >
> > Has anyone experienced something similar?
> >
> >
> >
> > Note that the config file loads fine w
Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
We’re using packages from EPEL, and upgraded to 2.6.3 maybe a month or so ago.
I didn’t notice any issues before with 2.6.2 and there was a bit of a gap on
using the config-reload after migrating to 2.6.3 and just now we’re noticing it.
I’ve also tested on test server with same os, packages, etc., but without any
active leases, and there’s no crash when reloading.
Thanks,
Diogo
From: Razvan Becheriu
Date: Tuesday, October 14, 2025 at 8:40 AM
To: Kea user's list
Cc: Kea user's list , Diogo André de Assumpção
Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Hi, We need more information. Do you use pkgs or do you compile? Have you been
using a different version before upgrading/installing? If using pkgs, are these
official ISC kea packages? Thank you, Razvan From: Diogo
Hi,
We need more information.
Do you use pkgs or do you compile?
Have you been using a different version before upgrading/installing?
If using pkgs, are these official ISC kea packages?
Thank you,
Razvan
From: Diogo
To: Kea
Cc: Diogo
Date: Tuesday, 14 October 2025 4:12 PM EEST
Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Thanks for the link, Darren. My lfc is set to 7200 seconds, and I can
consistently repro the issue, so unlikely to be hitting that condition. That
said, after I bumped the logs to debug I could see some better messages, which
seems related to memfile-lfc:
2025-10-14 06:04:41.596 INFO kea-dhcp6.dhcp6 DHCP6_CONFIG_COMPLETE DHCPv6
server has completed configuration: added IPv6 subnets: 4698; DDNS: disabled
2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv DHCPSRV_CLOSE_DB closing
currently open memfile database
2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv
DHCPSRV_TIMERMGR_UNREGISTER_TIMER unregistering timer: memfile-lfc
2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv
DHCPSRV_MEMFILE_LFC_UNREGISTER_TIMER_FAILED failed to unregister timer
'memfile-lfc': unable to unregister non existing timer 'memfile-lfc'
For reference, here’s what the lease section of my config looks like:
"lease-database": {
"type": "memfile",
"name": "/var/lib/kea/kea-dhcp6.csv",
"lfc-interval": 7200,
"persist": true
},
Thanks,
Diogo
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From: Kea-users on behalf of Darren Ankney
Sent: Tuesday, October 14, 2025 2:01:36 AM
To: Kea user's list
Subject: Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3
Hi Diogo,
That backtrace doesn't look particularly useful because no symbols
were found. Kea's logs would probably be far more useful in this
case. it would have some message indicating why it is exiting. Here
is one example of a problem you could be encountering:
https://urldefense.com/v3/__https://gitlab.isc.org/isc-projects/kea/-/issues/3986__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IJJDBDxQ$<https://urldefense.com/v3/__https:/gitlab.isc.org/isc-projects/kea/-/issues/3986__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IJJDBDxQ$>
but without log
messages, it is just guessing.
Thank you,
Darren Ankney
On Mon, Oct 13, 2025 at 6:15 PM Diogo André de Assumpção via Kea-users
wrote:
>
> Hi All,
>
> I’ve been experiencing an issue with kea-dhcp6 (4 doesn’t seem affected)
> where when I issue a config-reload command directly to the dhcp6 socket, the
> server crashes.
>
>
>
> Looking at the backtrace it seems to be related to the lease management – I’m
> using memfile – and maybe some cleanup that is done as part of the reload?
>
>
>
> Has anyone experienced something similar?
>
>
>
> Note that the config file loads fine when starting the server.
>
>
>
> Here’s a backtrace and a few more things from the coredump if it helps:
> https://gist.github.com/DiogoAndre/aa8c144329424b431b755711d7a96606
>
>
>
> Thanks,
> – Diogo
>
>
>
> --
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