Symptoms

The following error appears in the Cluster Configuration screen:

Multicast address does not correspond with cluster name. Adding new cluster nodes may fail.

Cause

By default, Confluence uses cluster name to generate a random multicast address. In this case, the multicast address and the cluster name are not synchronised.

Resolution

Verify that the multicast address is synchronised with the cluster name:

1. If applicable, stop all cluster nodes except for primary node

2. In primary node, browse tohttp://path-to-confluence/admin/cluster/hashclustername.jsp

3. Enter the previously assigned cluster name e.g. atlassian_cluster
4. Press Generate

5. Compare the generated multicast address with the value inside the primary node's <confluence-home>/confluence.cfg.xml. They should look like this:

   <property name="confluence.cluster.address">224.222.163.162</property>
   <property name="confluence.cluster.name">atlassian_cluster</property>
   

6. If the details do not match, shutdown the node and edit the <confluence-home>/confluence.cfg.xml to reflect the generated values
7. If applicable, apply the same changes in other cluster nodes

See CONF-10977 for more information.