+ boolean outOfSync = true;
+
+ // First check if the logs are in sync or not
+ if (lastIndex() == -1
+ && appendEntries.getPrevLogIndex() != -1) {
+
+ // The follower's log is out of sync because the leader does have
+ // an entry at prevLogIndex and this follower has no entries in
+ // it's log.
+
+ context.getLogger().debug(
+ "The followers log is empty and the senders prevLogIndex is {}",
+ appendEntries.getPrevLogIndex());
+
+ } else if (lastIndex() > -1
+ && appendEntries.getPrevLogIndex() != -1
+ && previousEntry == null) {
+
+ // The follower's log is out of sync because the Leader's
+ // prevLogIndex entry was not found in it's log
+
+ context.getLogger().debug(
+ "The log is not empty but the prevLogIndex {} was not found in it",
+ appendEntries.getPrevLogIndex());
+
+ } else if (lastIndex() > -1
+ && previousEntry != null
+ && previousEntry.getTerm()!= appendEntries.getPrevLogTerm()) {
+
+ // The follower's log is out of sync because the Leader's
+ // prevLogIndex entry does exist in the follower's log but it has
+ // a different term in it