The so-called split-brain problem (similar to schizophrenia) is that different nodes in the same cluster have different understandings of the state of the cluster.
Under normal circumstances, all nodes in the cluster should be consistent in the selection of the master in the cluster, and the obtained state information should also be consistent. Inconsistent state information indicates that the selection of the master node by different nodes is abnormal. - The so-called split-brain problem. Such a split-brain state directly causes the node to lose the correct state of the cluster, resulting in the cluster not working properly.
The solution is as follows: