Is there split brain possibility [closed]
Split-brain is a situation, when a replica got any changes, that are not applied in master server. Here is a good explanation.
Fencing method helps to avoid split-brain situation. Here are details about it.
If you dont want to have a deal with fencing, try to use quorum-oriented databases (etcd for example). Such applications usually use RAFT protocol for lead election, and prevent data changes if they are not in quorum majority.