CLUSTERDOWN Hash slot not served in case of single master failure

Hi Shuliyey, you have done nice work in this package, I have stucked on error CLUSTERDOWN Hash slot not served when I try to write to master

在搭建版本的集群环境曾出现各节点无法互相发现与Hash槽分配异常CLUSTERDOWN Hash slot not served的情况，故而把解决方式记录下来。

error_ draggable element must have an item slot If you are not using Redis in cluster mode or master-slave mode & still getting this error CLUSTERDOWN Hash slot not served then you must

error_ replication slot is active for pid redis 集群CLUSTERDOWN Hash slot not served 报错解决思路 Check slots coverage All 16384 slots covered 发现16384 个哈希槽全部分配好了