elastic 8.x 에서 java api client의 DeleteIndexRequest를 이용하여 Index 삭제 public void deleteIndex() { ElasticsearchClient client = null; try { // Index name to delete String indexName = "test-Index"; DeleteIndexRequest deleteIndexRequest = new DeleteIndexRequest.Builder().index(indexName).build() // ElasticSearchClient client = ElasticClient.getInstacne(); DeleteIndexResponse deleteResponse = client.ind..