elasticsearch启动时闪退了，打开/logs/elasticsearch.log日志文件查看候报错了：

org.elasticsearch.bootstrap.StartupException: ElasticsearchException[X-Pack is not supported and Machine Learning is not available for [windows-x86]; you can use the other X-Pack features (unsupported) by setting xpack.ml.enabled: false in elasticsearch.yml]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170) ~[elasticsearch-7.16.2.jar:7.16.2]
	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:157) ~[elasticsearch-7.16.2.jar:7.16.2]
	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:77) ~[elasticsearch-7.16.2.jar:7.16.2]
	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:112) ~[elasticsearch-cli-7.16.2.jar:7.16.2]
	at org.elasticsearch.cli.Command.main(Command.java:77) ~[elasticsearch-cli-7.16.2.jar:7.16.2]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:122) ~[elasticsearch-7.16.2.jar:7.16.2]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:80) ~[elasticsearch-7.16.2.jar:7.16.2]
Caused by: org.elasticsearch.ElasticsearchException: X-Pack is not supported and Machine Learning is not available for [windows-x86]; you can use the other X-Pack features (unsupported) by setting xpack.ml.enabled: false in elasticsearch.yml

解决方法：

修改elasticsearch-7.16.2\config\elasticsearch.yml

添加一行配置，

xpack.ml.enabled: false

然后就可以从新启动了！