注： 部分概念介绍来源于网络
GET /_cluster/health
{
"error": {
"root_cause": [
{
"type": "security_exception",
"reason": "current license is non-compliant for [security]",
"license.expired.feature": "security"
}
],
"type": "security_exception",
"reason": "current license is non-compliant for [security]",
"license.expired.feature": "security"
},
"status": 403
}ES的X-pack许可证是提供免费一个月的试用，但是到期之后，就会报这个错误，需要去es官网注册个账号，然后申请一个新的license，但是注册license 页面上面写着，6.3版本以后，Elastic Stack的默认发行版中包含基本（免费）层功能。无需许可证注册，也就是说，我现在用的6.7.2版本并不需要更新，只需要降级到基础版本即可文章来源：https://www.toymoban.com/news/detail-520137.html
POST /_license/start_basic?acknowledge=true
curl -XPOST "http://127.0.0.1:9200/_license/start_basic?acknowledge=true"文章来源地址https://www.toymoban.com/news/detail-520137.html
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