[ERR] Node 127.0.0.1:6001 is not empty. Either the node already knows other nodes

redis再次启动报错：
[ERR] Node 127.0.0.1:6001 is not empty. Either the node already knows other nodes (check with CLUSTER NODES) or contains some key in database 0.

解决：
删除生成的配置文件nodes.conf，如果不行则说明现在创建的结点包括了旧集群的结点信息，需要删除redis的持久化文件后再重启redis，比如：appendonly.aof、dump.rdb