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<div>Hi,</div>
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<div style="font-size: 12pt; font-family: arial, helvetica, sans-serif; color: #000000;" data-attr="forced_root_block_attrs">We need more information.</div>
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<p dir="auto">Do you use pkgs or do you compile?</p>
<p dir="auto">Have you been using a different version before upgrading/installing?</p>
<p dir="auto">If using pkgs, are these official ISC kea packages?</p>
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<p dir="auto">Thank you,</p>
<p dir="auto">Razvan</p>
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<blockquote style="margin: 0 0 0 .8em; border-left: 1px #ccc solid; padding-left: 1em;"><hr id="MESSAGE_DATA_MARKER"><strong>From: </strong>Diogo <kea-users@lists.isc.org><br><strong>To: </strong>Kea <kea-users@lists.isc.org><br><strong>Cc: </strong>Diogo <daa@meta.com><br><strong>Date: </strong>Tuesday, 14 October 2025 4:12 PM EEST<br><strong>Subject: </strong>Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3<br><br>
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<p class="MsoNormal">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:</p>
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<p class="MsoNormal">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</p>
<p class="MsoNormal">2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv DHCPSRV_CLOSE_DB closing currently open memfile database</p>
<p class="MsoNormal">2025-10-14 06:04:42.221 DEBUG kea-dhcp6.dhcpsrv DHCPSRV_TIMERMGR_UNREGISTER_TIMER unregistering timer: memfile-lfc</p>
<p class="MsoNormal">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'</p>
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<p class="MsoNormal">For reference, here’s what the lease section of my config looks like:</p>
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<p class="MsoNormal"> "lease-database": {</p>
<p class="MsoNormal"> "type": "memfile",</p>
<p class="MsoNormal"> "name": "/var/lib/kea/kea-dhcp6.csv",</p>
<p class="MsoNormal"> "lfc-interval": 7200,</p>
<p class="MsoNormal"> "persist": true</p>
<p class="MsoNormal"> },</p>
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<p class="MsoNormal">Thanks,</p>
<p class="MsoNormal">Diogo</p>
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<p class="MsoNormal">Get <a href="https://aka.ms/o0ukef" target="_blank" rel="noopener noreferrer">Outlook for iOS</a></p>
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<p class="MsoNormal"><strong><span style="font-size: 11pt; font-family: 'calibri' , sans-serif; color: black;">From:</span></strong><span style="font-size: 11pt; font-family: 'calibri' , sans-serif; color: black;"> Kea-users <kea-users-bounces@lists.isc.org> on behalf of Darren Ankney <darren.ankney@gmail.com><br><strong>Sent:</strong> Tuesday, October 14, 2025 2:01:36 AM<br><strong>To:</strong> Kea user's list <kea-users@lists.isc.org><br><strong>Subject:</strong> Re: [Kea-users] Dhcp6 crash with config-reload command v2.6.3</span></p>
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<p class="MsoNormal"><span style="font-size: 11pt;"><br><br>Hi Diogo,<br><br>That backtrace doesn't look particularly useful because no symbols<br>were found. Kea's logs would probably be far more useful in this<br>case. it would have some message indicating why it is exiting. Here<br>is one example of a problem you could be encountering:<br><a href="https://urldefense.com/v3/__https:/gitlab.isc.org/isc-projects/kea/-/issues/3986__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IJJDBDxQ$" target="_blank" rel="noopener noreferrer">https://urldefense.com/v3/__https://gitlab.isc.org/isc-projects/kea/-/issues/3986__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IJJDBDxQ$</a> but without log<br>messages, it is just guessing.<br><br>Thank you,<br>Darren Ankney<br><br>On Mon, Oct 13, 2025 at 6:15</span><span style="font-size: 11pt; font-family: 'arial' , sans-serif;"> </span><span style="font-size: 11pt;">PM Diogo André de Assumpção via Kea-users<br><kea-users@lists.isc.org> wrote:<br>><br>> Hi All,<br>><br>> 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.<br>><br>><br>><br>> 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?<br>><br>><br>><br>> Has anyone experienced something similar?<br>><br>><br>><br>> Note that the config file loads fine when starting the server.<br>><br>><br>><br>> Here’s a backtrace and a few more things from the coredump if it helps: <a href="https://gist.github.com/DiogoAndre/aa8c144329424b431b755711d7a96606" target="_blank" rel="noopener noreferrer"> https://gist.github.com/DiogoAndre/aa8c144329424b431b755711d7a96606</a> <br>><br>><br>><br>> Thanks,<br>> – Diogo<br>><br>><br>><br>> --<br>> ISC funds the development of this software with paid support subscriptions. Contact us at <a href="https://urldefense.com/v3/__https:/www.isc.org/contact/__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IBEgZWtQ$" target="_blank" rel="noopener noreferrer"> https://urldefense.com/v3/__https://www.isc.org/contact/__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IBEgZWtQ$</a> for more information.<br>><br>> To unsubscribe visit <a href="https://urldefense.com/v3/__https:/lists.isc.org/mailman/listinfo/kea-users__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IK-1-3Nd$" target="_blank" rel="noopener noreferrer"> https://urldefense.com/v3/__https://lists.isc.org/mailman/listinfo/kea-users__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IK-1-3Nd$</a> .<br>> Kea-users@lists.isc.org<br>-- <br>ISC funds the development of this software with paid support subscriptions. Contact us at <a href="https://urldefense.com/v3/__https:/www.isc.org/contact/__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IBEgZWtQ$" target="_blank" rel="noopener noreferrer"> https://urldefense.com/v3/__https://www.isc.org/contact/__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IBEgZWtQ$</a> for more information.<br><br>To unsubscribe visit <a href="https://urldefense.com/v3/__https:/lists.isc.org/mailman/listinfo/kea-users__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IK-1-3Nd$" target="_blank" rel="noopener noreferrer"> https://urldefense.com/v3/__https://lists.isc.org/mailman/listinfo/kea-users__;!!Bt8RZUm9aw!5lLpANoHvQQvKiYaNVp_snTIJEP7aIzeFRxARTJkRY0DpyQZ-bOuL5RS6BqpenRvmpHjAJR5IK-1-3Nd$</a> .<br>Kea-users@lists.isc.org</span></p>
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