Cluster panics (Non Clustered Confluence 2.10.4, 3.0.1 and 3.0.2)
There are multiple causes for this issue. Start with the parent article Confluence will not start due to fatal error in Confluence cluster.
Cluster Panic error messages occur during normal operations, at some time post-startup. This only applies to Confluence version 2.10.4, 3.0.1 or 3.0.2.
In versions 2.10.4, 3.0.1 and 3.0.2, the cluster safety mechanism is not synchronized.