Elasticsearch Connection is closed全文检索连接问题

Caused by: java.lang.RuntimeException: Connection is closed at 
org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.translateException
(ElasticsearchRestTemplate.java:425) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2] ... 
54 common frames omitted

大概就是说：连接已在org.springframework.data.elasticsearch.core处被关闭。

个人觉得是长时间没使用导致连接断开。

在elasticsearch配置类加上长连接

 .setHttpClientConfigCallback(httpClientBuilder ->{
                    httpClientBuilder.setDefaultIOReactorConfig(IOReactorConfig.custom()
                            .setSoKeepAlive(true)
                            .build());
                    return httpClientBuilder;
                })

这是我完整的配置类：

@Component
@ConfigurationProperties("es")
@Data
public class ESConfig {

    @Value("${es.ip}")
    private String ip;
    @Value("${es.port}")
    private int port;

    @Bean
    public RestHighLevelClient restHighLevelClient(){
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost(ip,port,"http")
                )
                       //配置长连接setHttpClientConfigCallback   默认 net.ipv4.tcp_keepalive_time = 7200s
                        .setHttpClientConfigCallback(httpClientBuilder ->{
                    httpClientBuilder.setDefaultIOReactorConfig(IOReactorConfig.custom()
                            .setSoKeepAlive(true)
                            .build());
                    return httpClientBuilder;
                })
        );
        return client;
    }


}