Java连接elasticsearch带账号和密码、Elasticsearch是如何实现master选举的

@Bean public RestHighLevelClient client() { System.out.println("start client()--------------"); System.out.println("==========" + host); System.out.println("=========" + port); System.out.println("==========" + username); System.out.println("=========" + password); RestHighLevelClient esClient = null; final BasicCredentialsProvider credentialsProvider = new BasicCredentialsProvider(); credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username, password)); esClient = new RestHighLevelClient(RestClient.builder( new HttpHost(host, Integer.parseInt(port))) .setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() { public HttpAsyncClientBuilder customizeHttpClient( HttpAsyncClientBuilder httpClientBuilder) { httpClientBuilder.disableAuthCaching(); return httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider); } }) ); return esClient; }

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