fix bug

@@ -15,8 +15,6 @@ import com.yoho.search.service.base.SearchCommonService;
 import org.apache.commons.collections.MapUtils;
 import org.elasticsearch.index.query.BoolQueryBuilder;
 import org.elasticsearch.index.query.QueryBuilders;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
@@ -40,7 +38,7 @@ public class SknRecallCacheBean{
      *
      * @return
      */
-    public List<RecallRequestResponse> batchRecallRecommedSknList(UserRecallRequest userRecallRequest,final List<Integer> recommedSknList) {
+    public List<RecallRequestResponse> batchRecallRecommedSknList(UserRecallRequest userRecallRequest,List<Integer> recommedSknList) {
         if(recommedSknList==null || recommedSknList.isEmpty()){
             return new ArrayList<>();
         }
@@ -49,6 +47,9 @@ public class SknRecallCacheBean{
     }
 
     private List<Integer> filterRecommedSkn(UserRecallRequest userRecallRequest, List<Integer> recommedSknList){
+        if(recommedSknList==null || recommedSknList.isEmpty()){
+           return new ArrayList<>();
+        }
         //1、构造searchParam
         ParamQueryFilter paramQueryFilter = userRecallRequest.getParamQueryFilter();
         SearchParam searchParam = new SearchParam();