After setting-up replication, if JIRA starts just fine, but Confluence freezes with something similar to:
You cannot access Confluence at present. Look at the table below to identify the reasons.
Type Description Exception Level Time
cluster Non Clustered Confluence: Database is being updated by another Confluence instance. Please see http://confluence.atlassian.com/x/mwiyCg for more details.
Your server id is: SOME-CODE-GOES-HERE
fatal 2015-04-27 00:25:15
This page will automatically update every 60 seconds.
to your server.cnf, as described here.