master not discovered yet, this node has not previously joined a bootstrapped (v7+) cluster

在部署 ElasticSearch7.13.4，启动节点时报错：

[2021-11-11T11:55:03,704][WARN ][o.e.c.c.ClusterFormationFailureHelper] 
[es_192.168.16.143_9253] master not discovered yet,this node has not previously joined a bootstrapped (v7+) cluster, 
and this node must discover master-eligible nodes [
　　　　es_192.168.16.90_9253, 
       es_192.168.16.143_9253, 
       es_192.168.17.15_9253, 
       es_192.168.16.154_9253, 
       es_192.168.16.139_9253, 
       es_192.168.16.87_9253, 
       es_192.168.16.98_9253] to bootstrap a cluster: 
have discovered [
    {es_192.168.16.143_9253}{iqIiy9v3QEy486Mokda1JQ}{uraxlZ4pQTmauo2PYeyi8A}{192.168.16.143}{192.168.16.143:9353}{m}, 
    {es_192.168.17.15_9253}{ehhbV1L4Sd6q4iEHD2ZXgw}{CsRqqbF5SDizhu8sMnk_mw}{192.168.17.15}{192.168.17.15:9353}{m}, 
    {es_192.168.16.90_9253}{W2Syx-M1Tf2wOXJzcwIpuw}{azVBifMUTPyHTiOkKxGEGw}{192.168.16.90}{192.168.16.90:9353}{m}]; 
discovery will continue using [192.168.16.90:9353, 192.168.17.15:9353] from hosts providers and [{es_192.168.16.143_9253}{iqIiy9v3QEy486Mokda1JQ}{uraxlZ4pQTmauo2PYeyi8A}{192.168.16.143}{192.168.16.143:9353}{m}] from last-known cluster state; node term 0, last-accepted version 0 in term 0

报错解析：

　　master节点还没选举出来，原因就是 在 master-eligible nodes 列表里的节点，必须有 N/2+1 个节点已启动才能进行选举出 master 

    也就是说：1.master节点启动个数不够 2. 节点启动了但是角色不是master 

我这个里的报错原因：

配置文件中初始的master列表（3个master）
cluster.initial_master_nodes: []

配置文件中集群中所有节点列表（总共7个节点：3-master、2-data、2-coordinating）
discovery.seed_hosts:[]

我把上面的量参数值，写反了，导致有启动时认为有7个master，虽然所有节点都启动了，但是实际上就3个master，4个非master节点

　　

总结：

　　遇到 master not discovered yet 这种报错，不要慌，基本都是自己的配置或启动问题导致的