解决springboot整合ElasticSearch报错：java.net.ConnectException: Connection refused: no further information

2020-04-30 09:38:48.393  WARN 10708 --- [2)-172.0.0.1] s.b.a.e.ElasticsearchRestHealthIndicator : Elasticsearch health check failed

java.net.ConnectException: Connection refused: no further information
    at org.elasticsearch.client.RestClient$SyncResponseListener.get(RestClient.java:943) ~[elasticsearch-rest-client-6.4.3.jar:6.4.3]
    at org.elasticsearch.client.RestClient.performRequest(RestClient.java:227) ~[elasticsearch-rest-client-6.4.3.jar:6.4.3]

2020-04-30 09:38:48.393  WARN 10708 --- [2)-172.17.49.43] s.b.a.e.ElasticsearchRestHealthIndicator : Elasticsearch health check failed

java.net.ConnectException: Connection refused: no further information
	at org.elasticsearch.client.RestClient$SyncResponseListener.get(RestClient.java:943) ~[elasticsearch-rest-client-6.4.3.jar:6.4.3]
	at org.elasticsearch.client.RestClient.performRequest(RestClient.java:227) ~[elasticsearch-rest-client-6.4.3.jar:6.4.3]
	at org.springframework.boot.actuate.elasticsearch.ElasticsearchRestHealthIndicator.doHealthCheck(ElasticsearchRestHealthIndicator.java:60) ~[spring-boot-actuator-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.actuate.health.AbstractHealthIndicator.health(AbstractHealthIndicator.java:82) ~[spring-boot-actuator-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.actuate.health.CompositeHealthIndicator.health(CompositeHealthIndicator.java:95) ~[spring-boot-actuator-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at org.springframework.boot.actuate.health.HealthEndpoint.health(HealthEndpoint.java:50) ~[spring-boot-actuator-2.1.8.RELEASE.jar:2.1.8.RELEASE]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
	at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282) ~[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE]

敲重点：Elasticsearch health check failed，指的是es健康检查失败

在这里我的解决方式是：关闭对es的健康检查（亲测有效！！！！！！！）

原来的配置是：

spring: 
  elasticsearch:
    jest:
      uris:
        - http://172.0.0.1:9200
      read-timeout: 5000

在yml配置文件中添加如下配置：（顶格写）

spring: 
  elasticsearch:
    jest:
      uris:
        - http://172.0.0.1:9200
      read-timeout: 5000
management:
  health:
    elasticsearch:
      enabled: false