elasticsearch Elasticsearch问题，带“；集群uuid"；：&引用_那",；和许可证为空

安装elasticsearch 7.12.1后

使用此配置

network.host: 127.0.0.1
http.port: 9200
discovery.seed_hosts: ["127.0.0.1", "[::1]"]

在elasticsearch主页中显示json

{
  "name" : "master",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "_na_",
  "version" : {
    "number" : "7.12.1",
    "build_flavor" : "default",
    "build_type" : "zip",
    "build_hash" : "3186837139b9c6b6d23c3200870651f10d3343b7",
    "build_date" : "2021-04-20T20:56:39.040728659Z",
    "build_snapshot" : false,
    "lucene_version" : "8.8.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

在xpack中，许可证为空

，您应该添加

node.name: master
cluster.initial_master_nodes: ["master"]

转到您的elasticsearch.yml文件，然后重新启动elasticsearch服务