In some cases, like read more than write scenario, the replication
offset of the replicas are the same. When the primary fails, the
replicas have the same rankings (rank == 0). They issue the election
at the same time (although we have a random 500), the simultaneous
elections may lead to the failure of the election due to quorum.
In clusterGetReplicaRank, when we calculates the rank, if the offsets
are the same, the one with the smaller node name will have a better
rank to avoid this situation.
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Signed-off-by: Binbin <binloveplay1314@qq.com>
59aa00823c