Merge branch 'wyp/0324-recallFail' of Server/long-article-recommend into master

long-article-recommend-service/src/main/java/com/tzld/longarticle/recommend/server/service/recommend/RecommendService.java

@@ -82,6 +82,12 @@ public class RecommendService {
         setStrategy(request, param);
 
         RecallResult recallResult = recallService.recall(convertToRecallParam(param));
+        if (CollectionUtils.isEmpty(recallResult.getData())) {
+            RecommendResponse response = new RecommendResponse();
+            response.setCode(0);
+            response.setMsg("success");
+            return response;
+        }
         long t2 = System.currentTimeMillis();
         CostMonitor.logCost("Recommend", "Recall", t2 - start);
         RankResult rankResult = rankService.rank(convertToRankParam(param, recallResult));