fix

src/main/java/com/zzsn/knowbase/service/impl/KnowledgeServiceImpl.java

@@ -432,6 +432,8 @@ class KnowledgeServiceImpl implements IKnowledgeService {
         } catch (IOException e) {
             e.printStackTrace();
         }
+
+        if(null!=searchResponse&&null!= searchResponse.getHits()){
             SearchHit[] searchHits = searchResponse.getHits().getHits();
             List<KnowledgeVO> list = new ArrayList<>();
             for (SearchHit hit : searchHits) {
@@ -447,6 +449,8 @@ class KnowledgeServiceImpl implements IKnowledgeService {
             pageData.setRecords(list);
             return pageData;
         }
+        return new Page<>(pageNo, pageSize, 0);
+    }
 
     @Override
     public IPage<KnowledgeVO> listFromPython(KnowledgeParam knowledgeParam, Integer pageNo, Integer pageSize, String column, String order) {