[ERR] Node 192.168.25.135:7001 is not empty. Either the node already knows other nodes (check with CLUSTER NODES) or contains some key in database 0.

原文链接：https://www.cnblogs.com/huxinga/p/6644226.html

解决办法：将redis全部shutdown

将每个节点下aof、rdb、nodes.conf本地备份文件删除； 

这种情况可能发生在每次非正常关闭redis集群的时候