I frequently see cases where the follower prints the following after cluster is recovered. It prints it forever and does not seem to recover.

2017-04-07 11:24:41,471 | INFO | lt-dispatcher-20 | Shard | 187 - org.opendaylight.controller.sal-akka-raft - 1.4.3.Boron-SR3 | member-2-shard-default-operational (Follower): The log is not empty but the prevLogIndex 1685 was not found in it - lastIndex: 1685, snapshotIndex: -1
2017-04-07 11:24:41,471 | INFO | lt-dispatcher-20 | Shard | 187 - org.opendaylight.controller.sal-akka-raft - 1.4.3.Boron-SR3 | member-2-shard-default-operational (Follower): Follower is out-of-sync so sending negative reply: AppendEntriesReply [term=23, success=false, followerId=member-2-shard-default-operational, logLastIndex=1685, logLastTerm=9, forceInstallSnapshot=false, payloadVersion=5, raftVersion=3]