Why does node X keep getting fenced?
There can be multiple causes for nodes that repeatedly get fenced, but the bottom line is that one of the nodes in your cluster isn’t seeing enough “heartbeat” network messages from the node that’s getting fenced. Most of the time, these come down to flaky or faulty hardware, such as bad cables and bad ports on the network hub or switch. Test your communications paths thoroughly without the cluster software running to make sure your hardware is okay.
