elasticsearch-7.3.2logs目录下查找elasticsearch.log
org.elasticsearch.ElasticsearchException: Failure running machine learning native code. This could be due to running on an unsupported OS or distribution, missing OS libraries, or a problem with the temp directory. To bypass this problem by running Elasticsearch without machine learning functionality set [xpack.ml.enabled: false].
at org.elasticsearch.xpack.ml.MachineLearning.createComponents(MachineLearning.java:497) ~[?:?]
at org.elasticsearch.node.Node.lambda$new$9(Node.java:457) ~[elasticsearch-7.3.2.jar:7.3.2]
解决方法：
打开config目录下的elasticsearch.yml，添加如下一行配置：
xpack.ml.enabled: false
