SpringBoot 2.x 整合 ES2.x 报 failed to load elasticsearch nodes

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ERROR 2075 --- [           main] .d.e.r.s.AbstractElasticsearchRepository : failed to load elasticsearch nodes : org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available:

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  <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>2.0.2.RELEASE</version>
      <relativePath/> <!-- lookup parent from repository -->
  </parent>
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
  </dependency>

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spring.data.elasticsearch.repositories.enabled=true
spring.data.elasticsearch.cluster-nodes=192.168.xxx.xxx\:9300