[keycloak-user] Kubernetes: found IPv4 multicast address in an IPv6 stack

[Sebastian Laskawiec]

Hey Lukasz,

The clustering probably won't work in your setup. In other words, if you'd
like to add another Keycloak node to ensure HA or balance the load, that
won't work.

I guess, you're using IPv4 network in your datacenter, aren't you? If so,
please add -Djava.net.preferIPv4Stack=true switch to Keycloak to ensure,
JGroups use IPv4.

Thanks,
Sebastian

On Tue, Jan 15, 2019 at 9:22 AM Lukasz Lech <l.lech at ringler.ch> wrote:

> Hello,
>
> I was succesfully running Keycloak as docker image (4.8.1), however, when
> I try to run in Kubernetes, I'm getting the following error:
>
> 07:53:34,742 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool
> -- 52) MSC000001: Failed to start service
> org.wildfly.clustering.jgroups.channel.ee:
> org.jboss.msc.service.StartException in service
> org.wildfly.clustering.jgroups.channel.ee:
> java.lang.IllegalStateException: java.lang.Exception: found IPv4 multicast
> address /230.0.0.4 in an IPv6 stack
> at
> org.wildfly.clustering.service.FunctionalService.start(FunctionalService.java:70)
> at
> org.wildfly.clustering.service.AsyncServiceConfigurator$AsyncService.lambda$start$0(AsyncServiceConfigurator.java:117)
> at
> org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
> at
> org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
> at
> org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
> at
> org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
> at java.lang.Thread.run(Thread.java:748)
> at org.jboss.threads.JBossThread.run(JBossThread.java:485)
> Caused by: java.lang.IllegalStateException: java.lang.Exception: found
> IPv4 multicast address /230.0.0.4 in an IPv6 stack
> at
> org.jboss.as.clustering.jgroups.subsystem.ChannelServiceConfigurator.get(ChannelServiceConfigurator.java:116)
> at
> org.jboss.as.clustering.jgroups.subsystem.ChannelServiceConfigurator.get(ChannelServiceConfigurator.java:58)
> at
> org.wildfly.clustering.service.FunctionalService.start(FunctionalService.java:67)
> ... 7 more
> Caused by: java.lang.Exception: found IPv4 multicast address /230.0.0.4
> in an IPv6 stack
> at org.jgroups.stack.Configurator.setDefaultValues(Configurator.java:137)
> at org.jgroups.stack.ProtocolStack.init(ProtocolStack.java:829)
> at org.jgroups.JChannel.<init>(JChannel.java:200)
> at
> org.jboss.as.clustering.jgroups.JChannelFactory.createChannel(JChannelFactory.java:116)
> at
> org.jboss.as.clustering.jgroups.subsystem.ChannelServiceConfigurator.get(ChannelServiceConfigurator.java:96)
> ... 9 more
>
> Server seems to listen, going to / returns redirect to /auth, but going to
> /auth results in 404, no further error lands in logs...
>
> Anyone has any idea what it can be?
>
>
> Best regards,
> Lukasz Lech
>
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