Caused by: java.lang.NoClassDefFoundError: org/apache/lucene/search/join/ToParentBlockJoinQuery

> **Elasticsearch 版本6.3.2**
## 问题描述
我在使用SearchSourceBuilder中sort的方法，对某个字段排序，代码如下：

```searchSourceBuilder.sort("create_date", SortOrder.DESC);```

我在eclipse里面进行本地调试的时候，可以正常的进行排序，但是，当我在生产服务器上调用此接口的时候，我就得到下面的报错信息了。

我都调了两天了，谢谢。

## 出错信息
Caused by: java.lang.NoClassDefFoundError: org/apache/lucene/search/join/ToParentBlockJoinQuery
at org.elasticsearch.search.sort.SortBuilders.fieldSort(SortBuilders.java:46)
at org.elasticsearch.search.builder.SearchSourceBuilder.sort(SearchSourceBuilder.java:465)
at scn.microke.web.core.CloudQuestionController.searchQuestion(CloudQuestionController.java:183)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
... 86 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.lucene.search.join.ToParentBlockJoinQuery
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 100 common frames omitted