feat:修改AdRankItem

recommend-feature-client/src/main/java/com/tzld/piaoquan/recommend/feature/domain/ad/base/AdRankItem.java

@@ -4,6 +4,7 @@ import lombok.Data;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
 
 @Data
@@ -60,7 +61,7 @@ public class AdRankItem implements Comparable<AdRankItem> {
     // 特征
     private Map<String, Object> ext = new HashMap<>();
 
-    private Map<String, String> featureMap = new HashMap<>();
+    private Map<String, String> featureMap = new ConcurrentHashMap<>();
 
     private Map<String, Map<String, String>> metaFeatureMap = new HashMap<>();