Cluster setup failed due to the following error. Seems to be due to a glitch in the DNS, since an hour or so later panda was quite able to ping itself.

2006-11-24 09:51:10,597 ERROR [http-12300-Processor25] [opensymphony.webwork.dispatcher.ServletDispatcher] serviceAction Could not execute action
(Wrapped) (Wrapped: Address=localhost) java.net.UnknownHostException: panda.sydney.atlassian.com: panda.sydney.atlassian.com
at java.net.InetAddress.getLocalHost(InetAddress.java:1308)
at com.tangosol.net.InetAddressHelper.getLocalHost(InetAddressHelper.java:37)
at com.tangosol.coherence.component.net.ClusterConfig.setLocalAddressString(ClusterConfig.CDB:17)
at com.tangosol.coherence.component.net.Cluster$ClusterConfig.__init(Cluster.CDB:21)
at com.tangosol.coherence.component.net.Cluster$ClusterConfig.<init>(Cluster.CDB:5)
at com.tangosol.coherence.component.net.Cluster.__init(Cluster.CDB:6)
at com.tangosol.coherence.component.net.Cluster.<init>(Cluster.CDB:5)
at com.tangosol.coherence.component.net.Cluster.<init>(Cluster.CDB:1)
at com.tangosol.coherence.component.util.SafeCluster.restartCluster(SafeCluster.CDB:3)
at com.tangosol.coherence.component.util.SafeCluster.getRunningCluster(SafeCluster.CDB:23)
at com.tangosol.coherence.component.util.SafeCluster.ensureRunningCluster(SafeCluster.CDB:1)
at com.tangosol.coherence.component.util.SafeCluster.start(SafeCluster.CDB:2)
at com.atlassian.confluence.cluster.tangosol.TangosolClusterManager.startCluster(TangosolClusterManager.java:253)
at com.atlassian.confluence.cluster.tangosol.TangosolClusterManager.reconfigure(TangosolClusterManager.java:295)
at com.atlassian.confluence.cluster.DefaultClusterConfigurationHelper.joinCluster(DefaultClusterConfigurationHelper.java:57)
at com.atlassian.confluence.setup.DefaultBootstrapManager.joinCluster(DefaultBootstrapManager.java:312)
at com.atlassian.confluence.setup.actions.SetupClusterAction.joinNamedCluster(SetupClusterAction.java:99)
at com.atlassian.confluence.setup.actions.SetupClusterAction.execute(SetupClusterAction.java:43)