Product: Confluence
Environment
| Operating System | |
|---|---|
| Affect Version/s | 2.5.7 |
| JVM | |
| Database | Oracle 10.x |
| Application Server | Tomcat 5.5.x |
Error Message
Fatal error in Confluence cluster: Database is being updated by an instance which is not part of the current cluster. You should check network connections between cluster nodes, especially multicast traffic.
Symptom
The hosts are connected by crossover ethernet cable, so routing, router or switch issues are not possible. The hosts can ping each other across the cable.
Diagnostics/Test
Increase logging to WARN level - Confluence performs some UDP multicast testing.
snoop/wireshark/tcpdump show no activity reaching the remote host.
Root Cause
UDP multicast is not being permitted across the network interface.
Solution
Reconfigure the interface to permit UDP multicast.