我正在学习elasticsearch，我想使用hibernate search搜索数据，但发生了以下错误：

java.lang.UnsupportedOperationException: JsonObject
    at com.google.gson.JsonElement.getAsInt(JsonElement.java:243)
    at io.searchbox.core.SearchResult.getTotal(SearchResult.java:184)
    at org.hibernate.search.elasticsearch.impl.ElasticsearchHSQueryImpl.execute(ElasticsearchHSQueryImpl.java:301)
    at org.hibernate.search.elasticsearch.impl.ElasticsearchHSQueryImpl.queryEntityInfos(ElasticsearchHSQueryImpl.java:275)

这是我的依赖

at org.hibernate.search.query.hibernate.impl.FullTextQueryImpl.list(FullTextQueryImpl.java:197)
        at org.hibernate.search.jpa.impl.FullTextQueryImpl.getResultList(FullTextQueryImpl.java:157)
        at org.hibernate.demos.hswithes.model.Main.main(Main.java:37)

这是我的pom.xml

<dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-search-orm</artifactId>
                <version>5.6.1.Final</version>
            </dependency>
            <dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-search-elasticsearch</artifactId>
                <version>5.6.1.Final</version>
            </dependency>
            <dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-entitymanager</artifactId>
                <version>5.1.3.Final</version>
            </dependency>

我使用Java8和ElasticSearch6.8。