Register ISO: IPv6 addresses are not supported

[summer-abacus]

problem

We try to register a iso which is locally provided by one of the kvm hosts (Simple python http.server). This works on all kvm hosts except one.

Trying to register a iso from this host, always throws this error:

2025-12-22 15:27:21,406 INFO  [a.c.c.a.ApiServlet] (qtp1800976873-685:[ctx-c7c97905, ctx-4c472ac4]) (logid:2bbb2419) (userId=9 accountId=8 sessionId=node0p3ztuj6s7ymtvsue4fjttpaq0) 2a02:cd8:2ee3:e400:0:0:0:251 -- POST  431 IPv6 addresses are not supported (2a02:cd8:a00:0:0:0:0:1d5).

We had the issue during the installation, that the IPv6 address was wrong on our dhcp server. After correcting this the ipv6 address is still stored wrong somewhere in cloudstack.

Is it possible to change the IPv6 address of a kvm host or should we remove the host from the cluster and re-add it?

versions

Cloudstack 4.22.0
Debian 12

The steps to reproduce the bug

No response

What to do about it?

No response

[wido]

On this Agent, is IPv6 enabled in the Java stack as option for the JVM?

[summer-abacus]

We didn't configure IPv6 on JVM level. It is working on OS level only cloudstack uses a wrong IPv6 address for this host. I'll take a look at the jvm configuration.